A small block of mass \( m \) is pulled by a light rope \( \mathrm{P} \) on a quarter circular t...
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1A small block of mass \( m \) is pulled by a light rope
\( \mathrm{P} \) on a quarter circular track, having radius \( R \). If the
W force applied on the rope is \( F \), then the work done by the force till the block reaches from \( A \) to \( B \) is:
(1) \( F R \)
(2) \( F R \sqrt{2} \)
(3) \( \quad F 2 \pi R \)
(4) Zero
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