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प्रश्न
Which of the following does not posses the ability to do work not because of motion?
विकल्प
a sparrow flying in the sky
a sparrow moving slowly on the ground
a sparrow in the nest on a tree
a squirrel going up a tree
उत्तर
We will justify all statements one by one as,
(a) A sparrow flying in the sky possesses kinetic energy, which can be transformed into work.
(b) A sparrow moving slowly on the ground possesses kinetic energy, which can be transformed into work.
(c) A sparrow in the nest does not possess any kinetic energy as it is at rest. It does not possess the ability to do work in terms of motion of the body.
(d) A squirrel going up a tree possesses kinetic energy, which can be transformed into work.
Therefore, the answer is:
(c) A sparrow in the nest of a tree.
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