GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is work done?
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When energy is transferred to move an object.
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When a force is applied.
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When there is a large momentum.
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None of the above
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Explanation:
Detailed explanation-1: -When a force causes a body to move, work is done on the object by force. Work is the measure of the energy transfer when a force moves an object through a distance. So we say that energy is transferred from one energy store to another when work is done, and therefore, the energy transferred = work done.
Detailed explanation-2: -When work is done, energy is transferred from the agent to the object, which results in a change in the object’s motion (more specifically, a change in the object’s kinetic energy).
Detailed explanation-3: -Kinetic energy is the energy of motion. Friction is the resistance to motion created by two objects moving against each other. Friction creates heat.
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