Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Energy is measured in a. | joules. | b. | pounds. | c. | meters. | d. | newtons. | | |
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2.
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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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3.
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Which
of the following has kinetic energy? a. | a rock poised for a fall | b. | an archer's bow
that has been drawn back | c. | a rolling bowling ball | d. | a car waiting at
a red light | | |
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4.
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Potential energy that depends on height is called a. | kinetic
energy. | b. | gravitational potential energy. | c. | elastic
potential energy. | d. | thermal energy. | | |
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5.
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The
shock you receive from touching a doorknob is a form of a. | chemical
energy. | b. | nuclear energy. | c. | mechanical
energy. | d. | electrical energy. | | |
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6.
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An
example of something that stores chemical energy is a. | lightning. | b. | infrared radiation. | c. | a
match. | d. | a spring. | | |
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7.
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Visible light is an example of a. | chemical energy. | b. | electrical
energy. | c. | electromagnetic energy. | d. | nuclear
energy. | | |
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8.
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Niagara Falls is a good example of a. | kinetic energy being converted into potential
energy. | b. | potential energy being converted into kinetic
energy. | c. | energy being lost. | d. | energy being
created. | | |
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9.
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Energy conversion means a. | that energy can be created but not
destroyed. | b. | that energy can be destroyed but not
created. | c. | not wasting energy. | d. | that most forms
of energy can be converted into another form. | | |
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10.
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The
law of conservation of energy states that when one form of energy is converted into
another, a. | energy is
destroyed. | b. | energy is created. | c. | energy is
neither created nor destroyed. | d. | some amount of energy cannot be accounted
for. | | |
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11.
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An
example of a fossil fuel is a. | wood. | b. | petroleum. | c. | sugar. | d. | water. | | |
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12.
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The
type of energy stored by fossil fuels such as coal is a. | kinetic
energy. | b. | mechanical energy. | c. | potential
chemical energy. | d. | electromagnetic energy. | | |
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13.
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Fossil fuels contain energy that originally came from a. | earthquakes. | b. | waterfalls. | c. | the
sun. | d. | lightning. | | |
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Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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14.
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A
book sitting on a shelf has kinetic energy. _________________________
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15.
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A
compressed spring has elastic potential energy. _________________________
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16.
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A
light bulb converts electrical energy to electromagnetic energy.
_________________________
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17.
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When
a fossil fuel is burned, its potential chemical energy is converted to thermal energy in a process
known as photosynthesis. _________________________
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Completion
Complete each sentence or
statement.
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18.
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If
the velocity of an object is doubled, the kinetic energy of the object is multiplied by
____________________.
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19.
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____________________ energy is the energy associated with the motion or position of an
object and can be either kinetic energy or potential energy.
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20.
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As
water runs over a waterfall, its potential energy is converted to ____________________
energy.
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21.
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The
law of ______________________________ states that energy cannot be created or
destroyed.
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22.
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A
swinging pendulum gradually slows down because it encounters ____________________ at the pivot of the
string and from the air.
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23.
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Coal,
petroleum, and natural gas are all ____________________ fuels.
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Short Answer
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24.
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Which
letter represents the position at which the basketball has the greatest gravitational potential
energy? Explain.
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25.
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Which
letter represents the position at which the basketball has the greatest kinetic energy?
Explain.
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Essay (Extra Credit - Must do 2 out of 3 Questions)
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26.
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How
high must you lift a 25-newton book to give it the same increase in gravitational potential energy as
a 20-newton book that has been lifted 0.5 m? Explain your reasoning.
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27.
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A
1-kg cart moving at 2 m/s collides with a stationary 1-kg cart. The two carts stick together and move
forward at a velocity of 1 m/s. Determine whether kinetic energy was conserved in the collision. Use
the law of conservation of energy to explain the collision.
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28.
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You
are at an amusement park and their new roller coaster ride uses cars that have a mass of 500
kg. The highest point of the ride is 30 m high, and your friend makes a bet with you that your
science studies won’t help you guess what the kinetic energy of the roller coaster car is, as it
approaches the bottom of the ride (ground level - and splashes you with water). He tells you
that you can disregard the effects of friction and air resistance and that if he remembers correctly,
the gravitational acceleration constant is 9.8 m/s2. You tell him that the answer is
easy. Answer his question and show how you obtained your answer.
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