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Work, Energy, and Power — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power1 Mark
Question
A mass is moving in a circular path with constant speed. What is the work done in $\frac{3}{4}\text{th}$ of a rotation?
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Answer

Since centripetal force and displacement are perpendicular, work done is zero.

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