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Q.

Which of the following does not possess the ability to do work not because of motion?


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a

A sparrow flying in the sky

b

A sparrow moving slowly on the ground

c

A sparrow in the nest on a tree

d

A squirrel going up a tree 

answer is C.

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Detailed Solution

A sparrow in the nest on a tree does not possess the ability to do work, not because of motion.
Motion is defined as the change in the position of the body with respect to the surroundings. The ability to do work not because of motion can be done only when the body is at rest. In the given examples, a sparrow in the nest on a tree is not in motion. As its velocity is zero, it does not possess any kinetic energy. Therefore, work is done due to potential energy only.
 
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Which of the following does not possess the ability to do work not because of motion?