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Name: ______________
Chapter 10 Review Sheet
1. In science, a force is _____________________________________.
2. When one object pushes or pulls another object, the first object is
________________ a force on the second object.
3. Circle the letters of the two ways that forces are described.
a.
b.
c.
d.
Direction
Velocity
Strength
Acceleration
4. The SI unit used to measure the strength of a force is the _______________.
5. The overall force on an object after all the forces are added together is called the
________________.
6. When two forces act in the same direction, they are __________________
together.
7. Adding a force acting in one direction to a force acting in the opposite direction is
the same as adding a(n) _________________ number and a(n) ______________
number.
8. Unbalanced forces can cause an object to change its motion in three ways. What
are they?
____________________________________________________________________
____________________________________________________________________
9. Is the following sentence true or false? Unbalanced forces acting on an object
will change the object’s motion. _________________
10. Equal forces acting on one object in opposite directions are called ____________.
11. Is the following sentence true or false? Balanced forces acting on an object will
change the object’s motion. _________________
12. When you add equal forces exerted in opposite directions, the net force is
______________.
Building Vocabulary – match the terms with the definitions
_____ 13. Newton
a. the SI unit for force
_____ 14 Force
b. sum of all forces acting on an object
_____ 15 Unbalanced forces
c. push or pull
_____ 16 Balanced forces
d. can change an object’s motion
_____ 17 net force
e. will not change an object’s motion
18. Is the following sentence true or false? When two surfaces rub, the irregularities
of one surface get caught on those of the other surface. ___________
19. What is friction?
____________________________________________________________________
____________________________________________________________________
20. Friction acts in a direction ______________ to the object’s direction of motion.
21. The strength of the force of friction depends on what two factors?
____________________________________________________________________
____________________________________________________________________
22. How is friction involved in sledding and skiing?
____________________________________________________________________
____________________________________________________________________
23. Why does some friction occur with seemingly smooth surfaces?
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____________________________________________________________________
24. Which kind of friction requires more force to overcome, rolling friction or sliding
friction?
____________________________________________________________________
____________________________________________________________________
25. A force that pulls objects toward each other is called _________________
26. What does the universal law of gravitation state?
____________________________________________________________________
____________________________________________________________________
27. The force of attraction between two objects varies with what two factors?
____________________________________________________________________
____________________________________________________________________
28. What is the difference between weight and mass?
____________________________________________________________________
____________________________________________________________________
29. Weight is usually measured in ____________________.
30. Is the following sentence true or false? On the moon, your mass would be less
than it is on Earth, but your weight would be the same. _________________
31. When is an object said to be in free fall?
____________________________________________________________________
____________________________________________________________________
32. The greatest velocity a falling object reaches is called ___________________.
33. An object that is thrown is called a(n) _______________.
34. Vocabulary – write the definitions of the vocab words
Friction - __________________________________________________
Rolling Friction - ____________________________________________
Sliding Friction - ____________________________________________
Fluid Friction - ______________________________________________
Weight - ___________________________________________________
Free Fall - __________________________________________________
Gravity - ___________________________________________________
Terminal Velocity - ___________________________________________
Air Resistance - ______________________________________________
35. For an unmoving object to start moving, a(n) ___________________ has to act
on it.
36. What is Newton’s first law of motion?
____________________________________________________________________
____________________________________________________________________
37. What is inertia?
____________________________________________________________________
____________________________________________________________________
38. What is another name for Newton’s first law?
____________________________________________________________________
____________________________________________________________________
39. The amount of inertia an object has depends on its __________________.
40. What is Newton’s second law of motion?
____________________________________________________________________
____________________________________________________________________
41. What is the equation that describes the relationship among the quantities of
force, mass and acceleration?
____________________________________________________________________
____________________________________________________________________
42. How can you use Newton’s second law to find force?
____________________________________________________________________
____________________________________________________________________
43. What are two ways to increase the acceleration of an object?
____________________________________________________________________
____________________________________________________________________
44. What is Newton’s third law?
____________________________________________________________________
____________________________________________________________________
45. What is the name often given to the force exerted by the first object on the
second object? ____________
46. The action and reaction forces in any situation will always be ___________ and
_______________.
47. Explain why the equal action and reaction forces do not cancel each other when
one person hits a ball.
____________________________________________________________________
____________________________________________________________________
48. The product of an object’s mass and velocity is its __________________.
49. What is the equation for momentum?
____________________________________________________________________
____________________________________________________________________
50. What does the law of conservation of momentum state?
____________________________________________________________________
____________________________________________________________________
51. What does it mean to say that momentum is conserved?
____________________________________________________________________
____________________________________________________________________
52. Could an elephant have the same momentum as a golf ball? Explain
____________________________________________________________________
____________________________________________________________________
53. Which of Newton’s laws explains the lifting of a rocket into space?
____________________________________________________________________
____________________________________________________________________
54. When a rocket rises, what causes the action force?
____________________________________________________________________
____________________________________________________________________
55. When a rocket lifts off the ground, the net force is in an upward direction. Is the
upward pushing force greater or lesser than the downward pull of gravity?
__________
56. An object traveling in a circle is accelerating because it is constantly changing
____________.
57. For a satellite, what is the centripetal force that causes it to move in a circle?
___________________.
58. A satellite is a projectile that falls ____________ Earth rather than into Earth.
59. What force continually changes a satellite’s direction?
____________________________________________________________________
____________________________________________________________________
60. Which law of motion is used to explain how a rocket takes off?
____________________________________________________________________
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