Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The kinetic energy of the crate is 1/2 mv2.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 2] Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Kinetic energy is conserved.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 3] Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Linear momentum is not conserved.
a. True
b. False
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[Ques. 4] Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Angular momentum is conserved.
a. True
b. False
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[Ques. 5] For a body oscillating at the end of a spring, the energy is only elastic potential energy.
a. True
b. False
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[Ques. 6] The energy of a ball rolling up an inclined plane is an example of both kinetic and gravitational potential energy.
a. True
b. False
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[Ques. 7] The energy in the water at the top of a waterfall is an example of gravitational potential energy.
a. True
b. False
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[Ques. 8] The energy of a body moving across a horizontal surface is an example of kinetic energy.
a. True
b. False
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[Ques. 9] The energy stored in a stretched spring is an example of gravitational potential energy.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 10] The energy stored in a pile driver is an example of gravitational potential energy.
a. True
b. False
Indicate whether the statement is true or false
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