John goes for a run. From his house, he jogs north for exactly 5.0 min at an average speed of 8.0 km/h. He continues north at a speed of 12.0 km/h for...
A man starts his car from rest and accelerates at 2 m/s^2 for 2 seconds. He then continues at a constant velocity for 11 seconds until he sees a tree blocking the road and applies brakes. The car, decelerating at 2 m/s^2 finally comes to rest. Which of the following graphs represents the motion correctly?
A man starts his car from rest and accelerates at 2 m/s^2 for 2 seconds. He then continues at a constant velocity for 11 seconds until he sees a tree...
Moustapha Jones drives east at 100 km/hr for 3 hours then back west at 80 km/hr for 1.5 hours. Which pair of answers gives his average speed and average velocity
Moustapha Jones drives east at 100 km/hr for 3 hours then back west at 80 km/hr for 1.5 hours. Which pair of answers gives his average speed and average...
In the graph above (same as #6) a toy rolls from +3 m to +5 m. Which of the following statements is true?
In the graph above (same as #6) a toy rolls from +3 m to +5 m. Which of the following statements is true?Answer: xi = +3...
In the graph above what is the correct description of any location to the left of the zero? (graph shows a number line for position from 0 to 10)
In the graph above what is the correct description of any location to the left of the zero? (graph shows a number line for position from 0 to 10)Answer: negative...
Which of the following units is the SI unit of velocity?
Which of the following units is the SI unit of velocity?Answer: meter per sec...
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)Answer: A...
What is the speed of an object at rest?
What is the speed of an object at rest?Answer: 0.0 ...
Which of the following is a pair of vector quantities?
Which of the following is a pair of vector quantities?Answer: Velocity--Displacem...
A car is moving with a uniform speed of 15.0 m/s along a straight path. What is the distance covered by the car in 12.0 minutes?
A car is moving with a uniform speed of 15.0 m/s along a straight path. What is the distance covered by the car in 12.0 minutes?Answer: 1.08 x 10...
A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location of the plane will
A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location...
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land on the ground?
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far...
A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets.
A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall...
A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits the level ground below?
A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits...
When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?
When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?Answer: It is less than its initial...
A ball thrown at an original speed of 8.0 m/s at an angle of 35 degrees above the horizontal. What is the speed of the ball when it returns to the same horizontal level?
A ball thrown at an original speed of 8.0 m/s at an angle of 35 degrees above the horizontal. What is the speed of the ball when it returns to the same...
An Olympic athlete throws a javelin at four different angles above the horizontal, each with the same speed: 30 degrees, 40 degrees, 60 degrees, and 80 degrees. Which two throws cause the javelin to land the same distance away?
An Olympic athlete throws a javelin at four different angles above the horizontal, each with the same speed: 30 degrees, 40 degrees, 60 degrees, and 80...
At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?
At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?Answer: 45 degr...
Which of the following does not exhibit parabolic motion?
Which of the following does not exhibit parabolic motion?Answer: a flat piece of paper released from a win...
Which is the path of a projectile (in the absence of friction)?
Which is the path of a projectile (in the absence of friction)?Answer: a parab...
Which of the following is not an example of projectile motion?
Which of the following is not an example of projectile motion?Answer: a hot-air balloon drifting toward Ea...
Which of the following is an example of projectile motion?
Which of the following is an example of projectile motion?Answer: a thrown baseb...
Which of the following is the motion of objects moving in two dimensions under the influence of gravity?
Which of the following is the motion of objects moving in two dimensions under the influence of gravity?Answer: projectile mot...
Two balls are thrown horizontally. Ball C is thrown with a force at 20 N, and ball D is thrown with a force of 40 N. Assuming all other factors are equal, ball D will fall toward the ground
Two balls are thrown horizontally. Ball C is thrown with a force at 20 N, and ball D is thrown with a force of 40 N. Assuming all other factors are equal,...
A player kicks a football at an angle of 30.0 degrees above the horizontal. The football has an initial velocity of 20.0 m/s. Find the horizontal component of the velocity and the maximum height attained by the football.
A player kicks a football at an angle of 30.0 degrees above the horizontal. The football has an initial velocity of 20.0 m/s. Find the horizontal component...
A ball is thrown horizontally from a hill 29.0 m high at a velocity of 4.00 m/s. Find the distance between the base of the hill and the point where the ball hits the ground.
A ball is thrown horizontally from a hill 29.0 m high at a velocity of 4.00 m/s. Find the distance between the base of the hill and the point where the...
A soldier throws a grenade horizontally from the top of a cliff. Which of the following curves best describes the path taken by the grenade?
A soldier throws a grenade horizontally from the top of a cliff. Which of the following curves best describes the path taken by the grenade?Answer:&n...
The path of a projectile through space is called its:
The path of a projectile through space is called its:Answer: traject...
Two horizontal forces act on a 5.0-kg mass. One force has a magnitude of 8.0 N and is directed due north. The second force toward the east has a magnitude of 6.0 N. What is the acceleration of the mass?
Two horizontal forces act on a 5.0-kg mass. One force has a magnitude of 8.0 N and is directed due north. The second force toward the east has a magnitude...
A stack of books rests on a level frictionless surface. A force F acts on the stack, and it accelerates at 3.0 m/s2. A 1.0 kg book is then added to the stack. The same force is applied, and now the stack accelerates at 2.0 m/s2. What was the mass of the original stack?
A stack of books rests on a level frictionless surface. A force F acts on the stack, and it accelerates at 3.0 m/s2. A 1.0 kg book is then added to the...
Sue and Sean are having a tug-of-war by pulling on opposite ends of a 5.0-kg rope. Sue pulls with a 15-N force. What is Sean's force if the rope accelerates toward Sue at 2.0 m/s2?
Sue and Sean are having a tug-of-war by pulling on opposite ends of a 5.0-kg rope. Sue pulls with a 15-N force. What is Sean's force if the rope accelerates...
What is the mass of an object that weighs 250 N on the surface of the Earth where the acceleration due to gravity is 9.80 m/s2?
What is the mass of an object that weighs 250 N on the surface of the Earth where the acceleration due to gravity is 9.80 m/s2?Answer: 25.5...
If you push a 4.0-kg mass with the same force that you push a 10-kg mass from rest,
If you push a 4.0-kg mass with the same force that you push a 10-kg mass from rest,Answer: The 4.0 kg mass accelerates 2.5 times faster than the...
A sled weighing 100.N is held in place on a frictionless 20.0° slope by a rope attached to a stake at the top. The rope is parallel to the slope. What is the normal force of the slope acting on the sled?
A sled weighing 100.N is held in place on a frictionless 20.0° slope by a rope attached to a stake at the top. The rope is parallel to the slope. What...
A change in the gravitational force acting on an object will affect the object's?
A change in the gravitational force acting on an object will affect the object's?Answer: Wei...
The magnitude of the gravitational force acting on an object is
The magnitude of the gravitational force acting on an object isAnswer: Wei...
A hockey stick hits a puck on the ice. Identify the action-reaction pair in the situation?
A hockey stick hits a puck on the ice. Identify the action-reaction pair in the situation?Answer: The stick exerts a force on the puck; the puck...
A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situation
A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situationAnswer: The hammer exerts a force on the nail; the...
Newton's third law of motion involves the interactions of
Newton's third law of motion involves the interactions ofAnswer: Two objects and two for...
The statement by newton that for every action there is an equal and opposite reaction is which of his laws of motion
The statement by newton that for every action there is an equal and opposite reaction is which of his laws of motionAnswer: Th...
A net force of 6.8 N accelerates a 31kg scooter across a level parking lot. What is the magnitude of the scooters acceleration?
A net force of 6.8 N accelerates a 31kg scooter across a level parking lot. What is the magnitude of the scooters acceleration?Answer: .22 m/...
According to Newton's second law, when the same force is applied to two objects of different masses:
According to Newton's second law, when the same force is applied to two objects of different masses:Answer: The object with greater mass will experience...
Which statement about the acceleration of an object is correct?
Which statement about the acceleration of an object is correct?Answer: The acceleration of an object is directly proportional to the net external...
If a nonzero net force is acting on an object, then the object is definitely
If a nonzero net force is acting on an object, then the object is definitelyAnswer: Being accelera...
As an object falls toward earth
As an object falls toward earthAnswer: The upward acceleration of earth is negligible because of its large m...
A single force acts on an object. The components of this force act along the + x-axis and the y-axis. The single force that will bring the object into equilibrium has components that act along the
A single force acts on an object. The components of this force act along the + x-axis and the y-axis. The single force that will bring the object into...
A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is
A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium isAnswer: Z...
A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30 degrees above the horizontal. If the horizontal component of the force on the suitcase is 60.6 N, what is the force exerted on the handle?
A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30 degrees above the horizontal. If the horizontal component of the...
Which of the following is the tendency of an object to maintain its state of motion?
Which of the following is the tendency of an object to maintain its state of motion?Answer: Iner...
A length of force vector represents all of the following except
A length of force vector represents all of the following exceptAnswer: Forces exerted by the obj...
A newton is equivalent to which of the following quantities?
A newton is equivalent to which of the following quantities?Answer: Kg m/...
What causes a moving object to change direction
What causes a moving object to change directionAnswer: Fo...
Which of the following statements does NOT describe force
Which of the following statements does NOT describe forceAnswer: Force causes objects at rest to remain station...
Which of the following is the cause of acceleration?
Which of the following is the cause of acceleration?Answer: Fo...
You are pushing a rock along level ground and making the rock speed up. How does the size of the force you exert on the rock compare with the size of the force the rock exerts on you? The force you exert
You are pushing a rock along level ground and making the rock speed up. How does the size of the force you exert on the rock compare with the size of...
A 1500-kg car can accelerate from rest to 72 km/h in 8.0 s. What is the net force acting on the car to cause this acceleration?
A 1500-kg car can accelerate from rest to 72 km/h in 8.0 s. What is the net force acting on the car to cause this acceleration?Answer: 3.8...
A 6.0-kg wooden block is pulled across a carpet with a force of F = 36 N. The block begins at rest and accelerates to a velocity of 0.25 m/s in 0.50 s. What is the force of friction acting on the block?
A 6.0-kg wooden block is pulled across a carpet with a force of F = 36 N. The block begins at rest and accelerates to a velocity of 0.25 m/s in 0.50 s....
The relationship between force and acceleration is
The relationship between force and acceleration isAnswer: direct lin...
Which graph best describes the movement of an object on which no new force is exerted
Which graph best describes the movement of an object on which no new force is exertedAnswer: Linear Distance vs. Time Gr...
Which of the following system of forces provides the blocks the highest net force?
Which of the following system of forces provides the blocks the highest net force?Answer: ---> l"""l <--- 54...
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a minimum?
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a minimum?Answer: midway...
A mass on a spring undergoes SHM. When the mass passes through the equilibrium position, its instantaneous velocity
A mass on a spring undergoes SHM. When the mass passes through the equilibrium position, its instantaneous velocityAnswer: is maxi...
For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time?
For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time?Answer: freque...
Consider a 20.0-kg pendulum clock that keeps good time. If the clock is moved to a location where it weighs 74 N, how many minutes will the minute hand move in 1 h?
Consider a 20.0-kg pendulum clock that keeps good time. If the clock is moved to a location where it weighs 74 N, how many minutes will the minute hand...
Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?Answer: increases...
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?Answer: at...
Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?Answer: increases the energy...
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a maximum?
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a maximum?Answer: midway...
A vertical spring has a mass hanging from it, which is displaced from the equilibrium position and begins to oscillate. At what point does the system have the least potential energy?
A vertical spring has a mass hanging from it, which is displaced from the equilibrium position and begins to oscillate. At what point does the system...
In simple harmonic motion, the acceleration is proportional to
In simple harmonic motion, the acceleration is proportional toAnswer: the displacem...
Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional to
Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional toAnswer: displacem...
A mass M is attached to a spring with spring constant k. When this system is set in motion with amplitude A, it has a period T. What is the period if the amplitude of the motion is increased to 2A?
A mass M is attached to a spring with spring constant k. When this system is set in motion with amplitude A, it has a period T. What is the period if...
What is the spring constant of a spring that stretches 2.00 cm when a mass of 0.600 kg is suspended from it?
What is the spring constant of a spring that stretches 2.00 cm when a mass of 0.600 kg is suspended from it?Answer: 294 ...
A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the
A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and theAnswer: acceleration reach a maxi...
A 0.50-kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. What is the total energy of the system?
A 0.50-kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion...
A mass on a spring undergoes SHM. It goes through 10 complete oscillations in 5.0 s. What is the period?
A mass on a spring undergoes SHM. It goes through 10 complete oscillations in 5.0 s. What is the period?Answer: 0....
For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?Answer: per...
For a mass hanging from a spring, the maximum displacement the spring is stretched or compressed from its equilibrium position is the system's
For a mass hanging from a spring, the maximum displacement the spring is stretched or compressed from its equilibrium position is the system'sAnswer:...
A simple pendulum swings in simple harmonic motion. At maximum displacement,
A simple pendulum swings in simple harmonic motion. At maximum displacement,Answer: the acceleration reaches a maxim...
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?Answer: at...
In simple harmonic motion, the speed is greatest at that point in the cycle when
In simple harmonic motion, the speed is greatest at that point in the cycle whenAnswer: the magnitude of the acceleration is a minim...
Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?Answer: increases the energy...
How are frequency and period related in simple harmonic motion?
How are frequency and period related in simple harmonic motion?Answer: they are inversely rela...
The work done to move a spring away from its equilibrium position is equal to
The work done to move a spring away from its equilibrium position is equal toAnswer: the potential energy of the spr...
A mass M is attached to a spring with spring constant k. When this system is set in motion with amplitude A, it has a period T. What is the period if the mass is doubled to 2M?
A mass M is attached to a spring with spring constant k. When this system is set in motion with amplitude A, it has a period T. What is the period if...
Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?Answer: increases...
What happens when a periodic driving force is applied at a frequency close to the natural frequency of the system?
What happens when a periodic driving force is applied at a frequency close to the natural frequency of the system?Answer: The system will resonate...
If you take a given pendulum to the Moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum will
If you take a given pendulum to the Moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum willAnswer:...
The velocity of a mass attached to a spring is given by v = (1.5 cm/s) sin(ωt + π/2), where ω = 3.0 rad/s. What is the corresponding expression for x?
The velocity of a mass attached to a spring is given by v = (1.5 cm/s) sin(ωt + π/2), where ω = 3.0 rad/s. What is the corresponding expression for x?Answer: x...
A mass attached to a spring vibrates back and forth. At the equilibrium position, the
A mass attached to a spring vibrates back and forth. At the equilibrium position, theAnswer: velocity reaches a maxi...
Which of the following features of a given pendulum changes when the pendulum is moved from Earth's surface to the moon?
Which of the following features of a given pendulum changes when the pendulum is moved from Earth's surface to the moon?Answer: the restoring fo...
Which of the following is not an example of approximate simple harmonic motion?
Which of the following is not an example of approximate simple harmonic motion?Answer: a ball bouncing on the fl...
A mass on a spring undergoes SHM. When the mass is at maximum displacement from equilibrium, its instantaneous acceleration
A mass on a spring undergoes SHM. When the mass is at maximum displacement from equilibrium, its instantaneous accelerationAnswer: is a maxi...
Which of the following are characteristics of a mass in simple harmonic motion?
Which of the following are characteristics of a mass in simple harmonic motion?Answer: I. The motion repeats at regular intervals.II. The motion...
A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest. Write down its equation of motion.
A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance...
The total mechanical energy of a simple harmonic oscillator is
The total mechanical energy of a simple harmonic oscillator isAnswer: const...
A mass m hanging on a spring has a natural frequency f. If the mass is increased to 4m, what is the new natural frequency?
A mass m hanging on a spring has a natural frequency f. If the mass is increased to 4m, what is the new natural frequency?Answer: 0...
Doubling only the mass of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
Doubling only the mass of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?Answer: produces no cha...
What happens when a periodic driving force is applied at a frequency close to the natural frequency of the system?
What happens when a periodic driving force is applied at a frequency close to the natural frequency of the system?Answer: The system will resonate...
Tripling the displacement from equilibrium of an object in simple harmonic motion will change the magnitude of the object's maximum acceleration by what factor?
Tripling the displacement from equilibrium of an object in simple harmonic motion will change the magnitude of the object's maximum acceleration by what...
In simple harmonic motion, the speed is greatest at that point in the cycle when
In simple harmonic motion, the speed is greatest at that point in the cycle whenAnswer: the magnitude of the acceleration is a minim...
By what factor should the length of a simple pendulum be changed in order to triple the period of vibration?
By what factor should the length of a simple pendulum be changed in order to triple the period of vibration?Answer:&nbs...
What is the treatment of H. ducreyi?
What is the treatment of H. ducreyi?Answer: Treatment is either erythromycin or trimethoprim-sulfamethoxazole (TMP-SM...
What sexually transmitted disease (STD) is caused by Haemophilus ducreyi?
What sexually transmitted disease (STD) is caused by Haemophilus ducreyi?Answer: Chancroid, characterized by a painful genital ulcer and often localized...
How is M. catarrhalis infection treated?
How is M. catarrhalis infection treated?Answer: Almost all strains produce β-lactamase, so commonly prescribed antibiotics include amoxicillin-clavulanate,...
What diseases does Moraxella catarrhalis cause?
What diseases does Moraxella catarrhalis cause?Answer: Otitis media and sinusitis in children (third most common cause in the United States). Bronchitis...
How are these transmitted?
How are these transmitted?Answer: Ehrlichia chaffeensis: through the tick Amblyomma americanum (lone star tick) and is classically associated with...
How do cells infected with these organisms appear on microscopic examination?
How do cells infected with these organisms appear on microscopic examination?Answer: Ehrlichia chaffeensis infects monocytes and macrophages, forms...
How do infections present?
How do infections present?Answer: Most cases are asymptomatic, but more severe cases present like Rocky Mountain spotted fever (RMSF) except that...
What diseases do Ehrlichia chaffeensis and Anaplasma phagocytophilum cause?
What diseases do Ehrlichia chaffeensis and Anaplasma phagocytophilum cause?Answer: Ehrlichia chaffeensis: monocytic ehrlichiosis Anaplasma phagocytophilum:...
A young man presents with enlarged tender inguinal lymph nodes with draining sinuses and painful genital ulcers. He admits to recent unprotected sex. What is the likely diagnosis and causative organism?
A young man presents with enlarged tender inguinal lymph nodes with draining sinuses and painful genital ulcers. He admits to recent unprotected sex....
A 1-month-old infant, whose mother has a history of C. trachomatis genital infections, develops pneumonitis. How would you confirm the diagnosis of chlamydial pneumonitis?
A 1-month-old infant, whose mother has a history of C. trachomatis genital infections, develops pneumonitis. How would you confirm the diagnosis of chlamydial...
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