Ch2 test - Chapter 2 test PDF

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Chapter 2 test...

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1. The product of the mass (m) and the velocity (v) of an object is known as the: a. acceleration b. inertia c. momentum d. centripetal force

2. If an unbalanced force applied to an object doubles, then: a. its velocity doubles b. its acceleration doubles c. its acceleration increases by a factor of four d. its acceleration is cut in half

3. Acceleration occurs when an object undergoes: a. a speed increase b. a speed decrease c. a change in the direction of travel d. any of the above

4. A quantity of 5 m/s East is a measure of: a. velocity b. acceleration c. metric area d. speed

5. A Newton is a unit of: a. energy b. motion c. power d. force

6. A ________________ is that which causes a change in motion. a. velocity b. acceleration c. force d. speed

7. How fast an object is moving is a particular direction is described by: a. velocity b. speed c. acceleration d. force

8. The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called: a. inertia b. acceleration c. free fall d. impulse

9. Mass is a measure of: a. force b. weight c. inertia d. quantity of matter

10. A quantity of 5 m/s is a measure of: a. metric area b. velocity c. acceleration d. speed

11. A change in speed and/or direction of an object is called: a. force b. velocity c. speed d. acceleration

12. The distance covered during a certain amount of time describes an object's: a. all of the above b. acceleration c. speed d. force

13. Newton's third law of motion describes: a. how forces always occur in pairs (action and reaction) b. a relationship between acceleration, force and mass. c. the tendency of a moving or stationary object to resist any change in its motion d. none of these

14. ______________ is defined as speed with direction. a. Force b. Velocity c. Acceleration d. Momentum

15. Newton's first law of motion describes: a. force always come in pairs (action and reaction) b. the relationship between force, mass and acceleration c. none of the above d. the tendency of a moving or stationary object to resist any change in its motion

16. A push or pull on an object is: a. force b. acceleration c. velocity d. speed

17. Galileo discovered that an object in free fall (ignoring air resistance): a. has a velocity proportional to its weight b. none of the above c. falls at a constant velocity d. falls with increasing acceleration

18. Newton's second law of motion describes: a. the tendency of a moving or stationary object to resist any change in its motion b. the relationship between force, mass and acceleration c. how forces always occur in pairs (action and reaction) d. none of the above

19. Changes in the motion of an object result in an acceleration. a. True b. False

20. An automobile has how many different devices that can cause it to undergo acceleration? a. one b. none c. two d. three

21. A heavy object and a light object are dropped from rest at the same time in a vacuum. The heavier object will reach the ground: a. it depends on the shape of the objects b. before the lighter object c. after the lighter object d. at the same time as the lighter object

22. Considering the gravitational attraction between the Earth and Moon: a. the attraction varies with the Moon phase, being greatest at a full moon b. the more massive Earth pulls harder on the less massive Moon c. the less massive Moon pulls harder on the more massive Earth d. the attraction between the Earth and Moon and the Moon and Earth are equal

23. The difference between instantaneous and average speed is that: a. the final instantaneous speed is always the fastest speed b. average speed is the total distance divided by the total time of the trip c. instantaneous speed is always faster than average speed d. average speed is always faster than the instantaneous speed

24. For a constant mass, the acceleration of an object is directly proportional to the applied force. a. True b. False

25. When you roll a ball across the floor, it comes to a stop because you are no longer exerting a force on it. a. True b. False

26. An object accelerates when its speed or direction changes. a. True b. False

27. The attractive force a 70 kg person exerts on the Earth is much, much smaller than the force the Earth exerts on the person. a. True b. False

28. Imagine an experiment in which a 16 lb bowling ball and 10 lb bowling ball are dropped from the top of a building at the same time. The heavier ball will reach the ground first. a. True b. False

29. Mass is a measure of the inertia of an object. a. True b. False

30. According to Aristotle, a rock falls to the Earth because it is seeking its natural place. a. True b. False

31. The reason a moving object slows down is that its force of motion gradually runs out. a. True b. False

32. Newton's second law states that if an unbalanced force acts on an object, it will move at constant velocity. a. True b. False

33. The football team wins a tug-o-war with the chess team because it pulls harder on the rope than the chess team does. a. True b. False...