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Assessment
Forces and the Laws of Motion
Teacher Notes and Answers
4 Forces and the Laws of Motion
CHANGES IN MOTION
1.
2.
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9.
b
b
d
d
d
a
c
d
1. Identify the forces acting on the body and
the direction of the forces.
2. Draw a diagram to represent the isolated
object.
3. Draw and label force vectors for all the
external forces acting on the object.
10.
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Holt McDougal Physics
Section Quiz
Name: _____________________________ Class: __________________Date: __________________
Assessment
Forces and the Laws of Motion
Section Quiz: Changes in Motion
Write the letter of the correct answer in the space provided.
_____ 1. An action exerted on an object which may change the object’s state of
rest or motion defines
a. acceleration.
b. force.
c. mass.
d. velocity.
_____ 2. Units that measure weight are units of
a. acceleration.
b. force.
c. mass.
d. velocity.
_____ 3. Which of the following statements are true about the concept of field
forces?
I. Field forces can be exerted by objects that are in physical contact.
II. Field forces can be exerted by objects that are not in contact.
III. There are four fundamental field forces.
a. I only
b. II only
c. II and III
d. I, II, and III
_____ 4. A force unit is defined as the product of a mass unit and a unit of
a. time.
b. displacement.
c. velocity.
d. acceleration.
_____ 5. Which of the following statements describe force diagrams?
I. Force diagrams show force vectors as arrows.
II. Forces exerted on the object are represented.
III. Forces exerted by the object are represented.
a. I and II
b. I and III
c. II and III
d. I, II, and III
© Houghton Mifflin Harcourt Publishing Company
Holt McDougal Physics
1
Section Quiz
Name: _____________________________ Class: __________________Date: __________________
Forces and the Laws of Motion continued
_____ 6. Which of the following statements describe free-body diagrams?
I. Force diagrams show force vectors as arrows.
II. Forces exerted on the object are represented.
III. Forces exerted by the object are represented.
a. I and II
b. I and III
c. II and III
d. I, II, and III
_____ 7. The gravitational force exerted on an object would most likely be
represented by which force vector?
a. ↑
b. →
c. ↓
d. ←
_____ 8. Two books are lying next to each other on a library table. The force due
to gravity on the first book is 9 N and on the second is 13 N. The
gravitational force on the table itself is 125 N. The floor supports the
table with an upward force of 147 N. In a free-body diagram of the
table, how many contact forces and how many field forces should be
represented?
a. 1, 2
b. 1, 3
c. 2, 2
d. 3, 1
9. Sequence the steps in drawing a free-body diagram.
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10. A draft horse exerts a horizontal force of 600 N dragging a log, on which the
force of friction is 500 N. The force due to gravity on the log is 700 N and the
ground exerts an upward force of 700 N on it. Draw a free-body diagram of
the log.
© Houghton Mifflin Harcourt Publishing Company
Holt McDougal Physics
2
Section Quiz