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A block of mass M is pulled along a hori...

A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted by the rope on the block will be

A

`frac(Pm)(M+m)`

B

`frac(Pm)(M-m)`

C

P

D

`frac(PM)(M+m)

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