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Chapter 9 and 10 - Study Guide
1. A _____________ is a push or a _______________. These can result from
actions such as twisting, _________________, ________________ and
_______________.
2. What do you call the sum of all of the forces acting on an object?
3. Describe the difference between a balanced and unbalance force.
4. When an object resists a change in it motion, this is called___________________.
5. Give one example of question #5 that can happen when you ride in a car that stops
suddenly.
6. What is Newton’s 1st Law of Motion?
7. What is Newton’s 2nd Law of Motion?
8. What is Newton’s 3rd Law of Motion?
9. What do you call the force that is caused by two surfaces rubbing against each
other?
10. What two things does friction depend on?
1.
2.
11. Friction ________________ motion, causing moving objects to
__________________.
12. Name three types of friction and give one example for each.
1.
ex:
2.
ex:
3.
ex:
13. What force pulls objects toward other objects such as the Earth, the Moon, or the
Sun?
14. How fast do objects in freefall accelerate towards Earth?
15. Eventually objects falling towards Earth will stop accelerating because of
___________ _____________________.
16. The answer to #15 depends on the ____________, _____________, and
______________ of an object.
17. The top speed an object like a sky diver reaches while falling is called
__________________ ______________________.
18. What two forces are equal when the answer to #17 is reached?
19. What lowers the terminal velocity of a skydiver so they can land safely?
20. Describe the difference between weight and mass.
21. What states that the force of gravity exists between all objects in the universe?
22. The Moon’s gravity is ______________ that of Earth.
23. Give two examples of Newton’s 3rd Law (these are not in your notes….think
about the Newton Vehicle Project).
1.
2.
24. How do you figure out the momentum of an object?
25. Can a golf ball and an elephant have the same momentum? Explain.
26. What does it mean to say that momentum is conserved after two pool balls hit
each other? (hint: compare their momentum before and after the collision)
Be sure to (1) ALWAYS write the equation, (2)plug in the numbers and units,
and (3) give the answer with the correct units.
27. An ant can travel approximately 30 meters per minute. How many meters could
an ant move in 45 minutes?
28. How much time would it take for the sound of thunder to travel 2000 meters if
sound travels a the speed of 330 m/s ?
29. Calculate the average speed (in meters/sec) if a Cheetah runs 140 meters in 5
seconds.
30. The Indy-500 race car then slows from 36 m/s to 15 m/s over 3.0 s. What is the
acceleration over this time interval?
31. An Indy-500 race car’s velocity increases from 4.0 m/s to 36 m/s over a 4 s
period. What is the acceleration?
32. A man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s2. What
amount of force acted on the ball?