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Name __________________________________________________ Date _____________________ Class ____________
Chapter Test
B
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 noncontact force?
A. a girl riding a skateboard
B. a leaf falling to the ground
C. a boy hitting a baseball with a bat
D. two bumper cars hitting each other
2. Which statement tells about acceleration?
A. Acceleration is measured in newtons.
B. Acceleration occurs when forces are balanced.
C. Acceleration is in the same direction as net force.
D. An accelerating object has an unchanged velocity.
3. What factors do you need to know to compute acceleration?
A. inertia and mass
B. mass and velocity
C. net force and mass
D. velocity and force
5. What is a tension force?
A. friction between objects
B. gravitational pull between objects
C. magnetic attraction between molecules
D. a pulling force exerted on a material when it is stretched
Part B. Matching and Completion
Directions: Write the letter of the correct term on the line next to its description.
1. a force that is exerted only when two objects
are touching
2. a force that one object exerts on another when
they are not touching
32
Forces
A. net force
B. contact force
C. balanced forces
3. when the net force of an object is zero
D. noncontact force
4. when the net force on an object is not zero
E. unbalanced forces
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
4. What does a force vector show?
A. the force’s speed and direction
B. the force’s acceleration and direction
C. the force’s magnitude and direction
D. the force’s velocity and direction
Name __________________________________________________ Date _____________________ Class ____________
Chapter Test
B
CONTINUED
Directions: Write the term or phrase that best completes each sentence.
5.
is an attractive force between all objects that have mass.
6. The
states that all objects are attracted to each other and that the
force of attraction depends on their masses and the distance between them.
7. The weight of an object is the
8.
exerted on an object.
is a contact force that acts to resist sliding between two touching
surfaces.
9. A(n)
is a force exerted by a material when it is stretched or
compressed.
Part C. Completing a Table
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
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.
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.
Part D. Short Answer
Directions: Respond to each question or statement in the space provided.
1. Calculate the acceleration of an object with a mass of 2 kg when 10 N are exerted on the object.
Forces
33
Name __________________________________________________ Date _____________________ Class ____________
Chapter Test
B
CONTINUED
2. Define the law of universal gravitation. Indicate why we can feel the effects of Earth’s
gravitational pull, but not the Moon’s.
3. Interpret A girl is holding a block. If the block isn’t moving, what forces are acting on it? What
do you know about them?
Part E. Concept Application
Directions: Respond to each question or statement in the space provided.
1. Elliot is rearranging his room. He pushes a dresser from his brother’s room, which is carpeted,
to his room, which has a linoleum floor. The dresser is harder to push in his brother’s room, but
moves easily in his room. Analyze the force that explains why more applied force was needed to
move the dresser in the carpeted room.
Identify the action-reaction forces.
3. Analyze In the example above, what are the balanced forces on the chain? What happens to the
forces on the chain if the dog pulls the chain away from the wall and runs off to play?
34
Forces
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. A dog on a chain is fastened to the side of a house. The dog pulls on the end of the chain.