Give one example of a body that has potential energy, in each of the following :
(a) due to its position at a height;
(b) due to its elongated stretched state.
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Solution
P.E. due to its position at a height : Water at a height has P.E. stored in it. Falling water from a height can be used to do work like turning a wheel;
P.E. due to its elongated stretched state : A stret ched rubber band (elongated state) has potential energy. It does work in restoring itself to its original state. A pebble placed on the stretched rubber catapujt, is thrown away when it is released to restore its original state.