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Work, Energy and Power
Question
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When an arrow is shot from a bow, from where does it get kinetic energy?

Answer

When a bow is stretched, the rope of the bow acquires elastic potential energy due to its shape. Thus, when the arrow is shot, the potential energy of the rope is converted into kinetic energy of the arrow. 

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Some More Questions From Work, Energy and Power Chapter

What are different units of energy?

What is watt?

Define watt.

How many joules are there in one eV?

What is the relation between kWh and Joule?

Does the body at rest possess energy?

By eating two apples, a person starts pushing the wall of room. If food value of apple is 100 calories per apple, how much work he will do in pushing the wall in one hour?

A man is rowing upstream and is at rest w.r.t. shore. Is he doing work w.r.t. shore?

Is frictional force conservative?