Understanding Energy — Test Answers

Which pair of labels is correct?

What conclusion is best supported by Lamar’s work?

At which landing site would the lander have the greatest amount of gravitational potential energy?

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What term is used to describe a system that loses energy to objects that are not part of the system?

What is the unit for work?

A box is released from rest and slides down a ramp in a closed system. Even though the box speeds up, its kinetic energy at the bottom of the ramp is less than the potential energy that it had at the top of the ramp. What best explains why the box’s final kinetic energy is less than its initial potential energy?

What is the best description of the energy stored in a stretched or compressed object?

Which best identifies the requirements for work to be performed?

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Suchita is going to make an energy transfer diagram to represent the energy transformations associated with the flame of a gas stove. The diagram will show that the chemical energy of the fuel transforms into 50 J of chemical energy, 400 J of heat, and 200 J of light. Which statement describes Suchita’s final diagram?

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Energy can be changed from one form to another. Which terms can be used to describe these changes? Choose two correct answers.

If 3 comma 600 J of work is done in 3 point 0 s , what is the power?

Which object has the least amount of kinetic energy?

A 60 point 0 kilograms object is moving east at 8.00 meters per second , and then slows down to 4.00 meters per second How much work was done?

When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy. The more steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted. Which object would likely have the least amount of wasted energy?

What must be true of an object that has gravitational potential energy?

How much total energy does this truck put out?

This roller coaster’s track is nearly frictionless, so resistance can be ignored. Using g is equal to 9 point 8 the fraction with numerator m and denominator s squared , what best describes the roller coaster car when it is at the top of the loop-de-loop?