Avoiding Careless Mistakes
Students often make mistakes when they fail to examine a test question and possible answers thoroughly. Read the question carefully and underline key words that may change the meaning of the question, such as not, except, excluding, and so on. After choosing an answer, reread the question to check your selection.
Which statement about work and energy is NOT correct?
Both can be expressed in joules.
Energy is the ability to do work.
Work done is always equal to energy input.
Energy input is always greater than work output.
Energy is transferred in order to accomplish work.
(Answer: C)
Choose the letter that best answers the question or completes the statement.
Which form of energy does a plant store when light is transformed during photosynthesis?
chemical energy
thermal energy
mechanical energy
electrical energy
nuclear energy
Which of the following is NOT an example of kinetic energy being converted to potential energy?
a basketball player jumping for a rebound
releasing a compressed spring
squeezing a rubber ball
pulling a sled up a hill
a swing moving upward
A 50.0-kg wolf is running at 10.0 m/sec. What is the wolf's kinetic energy?
5 J
500 J
5000 J
250 J
2500 J
Friction causes kinetic energy to be converted into
potential energy.
thermal energy.
mechanical energy.
electrical energy.
chemical energy.
Which of the following is NOT considered a renewable energy resource?
geothermal energy
biomass
hydroelectric energy
uranium
wind energy
Use the figure below to answer Questions 6 and 7.
A pendulum weight is released in position A. The weight moves through positions B, C, D, and E.
At which location(s) does the pendulum have maximum potential energy?
A and B
B and D
C only
D and E
A and E
At which location(s) does the pendulum have maximum kinetic energy?
A and B
B and D
C only
D and E
A and E