Multiple Choice
Identify the choice that best completes the
statement or answers the question.
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1.
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In a well-designed experiment, the one variable that is purposely changed is
known as the
a. | manipulated variable. | b. | responding variable. | c. | controlled
variable. | d. | independent variable. |
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2.
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A place or object used for comparison to determine if something is in motion is
called
a. | a position. | b. | a reference point. | c. | a
constant. | d. | velocity. |
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3.
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Speed equals distance divided by
a. | time. | b. | velocity. | c. | size. | d. | motion. |
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4.
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If the speed of an object does NOT change, the object is traveling at a
a. | constant speed. | b. | average speed. | c. | increasing
speed. | d. | decreasing speed. |
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5.
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The energy associated with motion is called
a. | kinetic energy. | b. | elastic potential energy. | c. | gravitational
potential energy. | d. | nuclear energy. |
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6.
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Which of the following has kinetic energy?
a. | a rock poised for a fall | b. | an archer’s bow that is drawn
back | c. | a rolling bowling ball | d. | a car waiting at a red
light |
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7.
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Unlike kinetic energy, potential energy is
a. | energy of motion. | b. | stored. | c. | conserved. | d. | not measurable. |
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8.
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Potential energy that depends on height is called
a. | kinetic energy. | b. | gravitational potential
energy. | c. | elastic potential energy. | d. | mechanical
energy. |
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9.
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When you rub your hands together on a cold day, you use friction to
convert
a. | mechanical energy into thermal energy. | b. | thermal energy into nuclear
energy. | c. | nuclear energy into electrical energy. | d. | electrical energy into electromagnetic
energy. |
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10.
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In physical science, a push or a pull is called a(n)
a. | force. | b. | acceleration. | c. | inertia. | d. | motion. |
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11.
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What happens when two forces act in the same direction?
a. | They cancel each other out. | b. | The stronger one prevails. | c. | They add
together. | d. | Their sum divided by two is the total force. |
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12.
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The force that one surface exerts on another when the two rub against each other
is called
a. | friction. | b. | acceleration. | c. | inertia. | d. | gravity. |
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13.
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The force that pulls falling objects toward Earth is called
a. | gravity. | b. | free fall. | c. | acceleration. | d. | air resistance. |
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14.
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Air resistance is a type of
a. | motion. | b. | acceleration. | c. | velocity. | d. | friction. |
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15.
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The tendency of an object to resist change in its motion is known as
a. | mass. | b. | inertia. | c. | force. | d. | balance. |
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16.
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The greater the mass of an object,
a. | the easier the object starts moving. | b. | the greater its inertia. | c. | the more balanced it
is. | d. | the more space it takes up. |
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17.
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According to Newton’s third law of motion, when a hammer strikes and
exerts force on a nail, the nail
a. | creates a friction with the hammer. | b. | disappears into the wood. | c. | exerts an equal
force back on the hammer. | d. | moves at a constant
speed. |
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18.
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The achievement of lifting a rocket off the ground and into space can be
explained by
a. | Newton’s first law. | b. | Newton’s second law. | c. | Newton’s third
law. | d. | the law of conservation of momentum. |
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19.
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What is required for a rocket to lift off into space?
a. | thrust that is greater than Earth’s gravity | b. | mass that is greater
than Earth’s | c. | very little air resistance | d. | more velocity than
friction |
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20.
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Which type of elastic force is
present in the strings on a guitar?
a. | compression | b. | tension | c. | friction | d. | inertia |
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