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A grinding machine whose wheel has a rad...

A grinding machine whose wheel has a radius of `1/pi` is rotating at 2.5 rev/sec. A tool to be shar-pened is held against the wheel with a force of 40N. If the coefficient of friction between the tool and wheel is 0.2, power required is

A

40 W

B

4 W

C

8 W

D

10 W

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The correct Answer is:
A
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AAKASH SERIES-APPENDICES (REVISION EXERCISE)-LAW OF MOTION
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