Which of the following is the tendency of an object to maintain its state of motion?
Answer: Inertia
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Physics
- 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 the next 30.0 min. He then turns around and jogs south at a speed of 15.0 km/h for 15.0 min. Then he jogs south for another 20.0 min at 8.0 km/h. He walks the rest of the way home. How many kilometers does John jog in total?
- 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?
- 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
- 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 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)
- Which of the following units is the SI unit of velocity?
- Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
- What is the speed of an object at rest?
- Which of the following is a pair of vector quantities?
- 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 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 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 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 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?
- When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?
- 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?
- 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?
- At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?
- Which of the following does not exhibit parabolic motion?
- Which is the path of a projectile (in the absence of friction)?
- Which of the following is not an example of projectile motion?
- Which of the following is an example of projectile motion?
- Which of the following is the motion of objects moving in two dimensions under the influence of gravity?
- 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
- 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.
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