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A boy of mass 50 kg is climbing a vertic...

A boy of mass 50 kg is climbing a vertical pole at a constant speed. If coefficient of fricition between his palms and the pole is 0.75, then the normal reaction between him and the pole is `("take "=10m//s^(2))`

A

700 N

B

625.67 N

C

550 N

D

666.67 N

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The correct Answer is:
D
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