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

`frac(Pm)((M+m))`

`frac(Pm)((M-m))`

`frac(PM)((M+m))`

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