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Work, Energy and Power
When a body is falling from a height h, the kinetic energy of the body increases.
Gain in K.E is at the expense of gravitational P.E. So, the P.E of the body decreases as it falls from a height h.
But, the total mechanical energy remains conserved.
Therefore, the graph of K.E and P.E of the body vs. height from the ground is given by,
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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?
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