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Name __________________________________________________ Date _____________________ Class ____________
Chapter
Review
CHAPTER 2
Forces
Part A. Vocabulary Review
Directions: Circle the word or words that correctly complete(s) each sentence.
1. A material exerts an elastic force when it is (stretched or compressed/melted or heated).
2. Weight is the (tension/gravitational) force exerted on an object.
3. A contact force is exerted only when two objects are (touching/moving away from one
another).
4. (Balanced/Unbalanced) forces exist when the net force on an object is zero.
5. A (contact/noncontact) force is the type of force one object exerts on another when they are
not touching.
6. Forces are (balanced/unbalanced) when the net force on an object is not zero.
7. Newton’s (first/second) law of motion states that if the net force on an object is zero, an object
at rest remains at rest, or, if the object is moving, it continues to move in a straight line with
constant speed.
8. (The law of universal gravitation/Newton’s second law of motion) states that all objects are
attracted to each other, and the force of attraction depends upon their masses and the distance
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
between them.
9. A (tension/compression) force is exerted on a material when it is squeezed.
10. A (tension/compression) force is exerted on a material when it is stretched.
11. (Gravity/Elastic force) is the attractive force between all objects that have mass.
12. Newton’s (second/third) law of motion states that the acceleration of an object equals the net
force divided by the object’s mass.
13. Newton’s (second/third) law of motion states that when one object exerts a force on another
object, the second object exerts an equal and opposite force on the first object.
Part B. Concept Review
Directions: On the line at the left, write T if the statement is true and F if it is false. For each false
statement, compose a new version that is true.
1. When the forces acting on an object are in the same direction, they cancel each
other.
Forces
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Name __________________________________________________ Date _____________________ Class ____________
Chapter Review CONTINUED
2. All objects with mass attract all other objects with mass.
3. If the same force acts on two different objects, the object with the greater mass will
have the greater acceleration.
4. An unbalanced force can cause an object to speed up, slow down, or change
direction.
Directions: Answer each of the following questions.
F
5. Use Newton’s second law of motion, a =
, to calculate the acceleration of a 250-kg object
m
acted on by 1250-N force. Show your work.
noncontact forces: tension, compression, magnetic, gravity, friction.
Contact forces:
Noncontact forces:
7. Infer Two identical objects are placed on two different ramps. The first object slides down its
ramp, while the second object does not. What can you conclude about the two ramps?
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Forces
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6. Apply what you have learned in this chapter by categorizing the following as contact forces or
Name __________________________________________________ Date _____________________ Class ____________
Chapter Test
A
CHAPTER 2
Forces
Part A. Multiple Choice
Directions: In the space at the left, write the letter of the phrase or sentence that correctly answers
each question.
1. Which is an example of a contact force?
A. a boy pulling a wagon
B. an apple falling from a tree
C. a spoon falling from a table
D. a magnet pulling a paperclip from far away
2. If the net force is zero, what else is always true?
A. The forces are in the same direction.
B. The forces are balanced.
C. The forces are unbalanced.
D. The speed is zero.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
3. Which describes Newton’s first law of motion?
A. Objects resist having their motion changed.
B. The more mass an object has, the more inertia it has.
C. The acceleration of an object is related to its mass and distance.
D. Acceleration of an object equals the net force divided by the mass.
Part B. Matching
Directions: Write the letter of the correct term on the line next to its description.
Matching Set 1
1. when the net force of an object is zero
A. force
2. a push or pull
B. net force
3. combination of all forces acting on an object
C. balanced forces
Matching Set 2
4. an attractive force between all objects that
D. weight
have mass
E. gravity
5. the gravitational force exerted on an object
F. friction
6. a contact force that acts to resist sliding
between two touching surfaces
Forces
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Name __________________________________________________ Date _____________________ Class ____________
Chapter Test
A
CONTINUED
Part C. Completing a Table
Directions: If the statement or term below identifies a force, write it under Force in the table below. If it
does not identify a force, write it under Not a Force. Remember: a force is a push or pull that is exerted
by one object on another.
the time it takes to make a trip
friction
the mass of a person on a scale
speed
the pull of a magnet on a paper clip
color
the weight of a person standing still
taste
pushing your friend toward the door
gravity
Force
Not a Force
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Directions: Respond to each statement in the space provided.
1. Tell two factors that influence the acceleration of an object.
2. State the law of universal gravitation.
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Forces
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Part D. Short Answer