# Physics Unit Exam 1

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1.
1 point
4. A force ___.
2.
1 point
11. An example of acceleration is ___.
3.
1 point
19. You ride your bike around a corner at a constant velocity of 11 km/hr. What changes?
4.
1 point
18. At the bottom of a hill a runner jobs 4 m/s north. One minute later, at the top of the hill, the jogger's velocity is 1 m/s north. What is the jogger's acceleration from the bottom of the hill to the top?
5.
1 point
6. The force of gravity is greater between two objects that ___.
6.
1 point
1. Friction is a force that ___.
7.
1 point
8. In 1.5 hours you walk 7.5 km. When you divide 7.5 by 1.5 you are calculating ___.
8.
1 point
27. Staying seated in a chair is an example of Newton's ___ law(s).
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1 point
30. Which of the following will have the greatest air resistance?
10.
1 point
15. Gravitational forces depend on ___ and ___.
11.
1 point
21. Newton's first law applies to ___.
12.
1 point
26. Newton's third law of motion states that if a force is exerted on an object. another force occurs that is ___.
13.
1 point
22. Acceleration of an object ___.
14.
1 point
3. If Earth's mass doubled, your weight would ___.
15.
1 point
20. When a soccer ball is kicked, the action and reaction forces do not cancel each other out because ___.
16.
1 point
5. Which type of friction causes a sky diver's acceleration to change as she falls?
17.
1 point
24. What force is necessary to accelerate a 1,250 kg car at a rate of 40 m/s/s?
18.
1 point
7. A reference point for determining position and motion could be ___.
19.
1 point
12. What is the net force when you combine a force of 7N north with a force of 5N south?
20.
1 point
23. If three balls were dropped from a height all at the same time, which would hit the ground first? (Assume there is no air resistance.)
21.
1 point
10. A plane passes over Cresson with a velocity of 8,000 m/s north. This same plane passes over Altoona 40s later at a velocity of 10,000 m/s. What is the plane's acceleration from Cresson to Altoona?
22.
1 point
29. The curved path resulting from inertia and gravity working together on a moving object is known as ___.
23.
1 point
16. In an action film, the hero is running forward along the top of a train going 40 m/s. He is chasing a villain at a rate of 3 m/s. What is the resultant velocity of the hero?
24.
1 point
17. An object's velocity remains constant when its ___ do not change.
25.
1 point
9. If a bus is traveling 15 m/s south and speeds up to 20 m/s, this is a change in ___.
26.
1 point
2. Rolling friction ___.
27.
1 point
14. A good rule of thumb around a swimming pool is "no running". The deck around a pool becomes slippery when wet due to ___ friction.
28.
1 point
25. Newton's second law of motion states that an object's acceleration ___.
29.
1 point
13. Balanced forces applied to an object ___.
30.
1 point
28. Which of the following in NOT an example of Newton's third law of motion?