Part A
True/False
Indicate whether the statement is true or false.
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1.
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You have to use more force to move an object down a slope.
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2.
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The force of gravity is different on Earth than it is on the Moon.
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3.
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You can change the way that a ball moves by changing your force.
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4.
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Moving an object across a rough surface is more difficult than moving it across
a smooth surface because of balanced forces.
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5.
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Forces can combine and change the way that an object moves.
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Part B
Complete the Sentences
Use the following words to complete the
sentences.
weight surface
texture force
friction equilibrium
slope load
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6.
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___________ is the pull of gravity on an object.
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7.
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An object is in _______________when there is no change in its motion.
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8.
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___________ is a force between two surfaces.
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9.
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___________ affects the amount of friction between two objects.
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10.
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The ___________ is the weight of an object that is being moved.
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11.
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When you increase the ___________ of a ramp, you have to use more force to lift
an object.
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12.
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___________ is a push or pull that affects how an object moves.
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Part C
Multiple Choice
Identify the letter of the choice that best completes the
statement or answers the question.
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13.
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Forces are balanced when there is
a. | no change in the way that an object moves. | b. | a change in the way
that an object moves. |
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14.
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Forces are unbalanced when
a. | the forces are equal. | b. | one force is greater than
another. |
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15.
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A spring scale measures
a. | friction. | b. | slope. | c. | force. |
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16.
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Friction
a. | is always an advantage. | b. | is always a disadvantage. | c. | can be an advantage
and a disadvantage. |
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Part D
Answer the Question
Use sentences to answer the question.
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17.
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What three things affect the amount of force that is needed to move an
object?
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