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प्रश्न
A stone whirled around in a circle with constant speed does:
पर्याय
maximum work
some work
no work
none of these
MCQ
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उत्तर
No work
Explanation:
The centripetal force on the stone points towards the centre, while its instantaneous displacement is along the tangent to the circle. These directions are perpendicular, so the force does no work.
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