Q.

A block of mass M is pulled along horizontal frictionless surface by a rope of mass m. Force p is applied at one end of rope Fig.  The force whichthe rope exerts on the block is

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a

P(M−m)

b

PM(m+M)

c

PM(m+M)

d

PM(M−m)

answer is C.

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Detailed Solution

Let o be the common acceleration of the system. HereT =M o for blockP -T =m o for rope∴P - M a=ma or P = a(M+m)or a=P(M+m)Now T=MP(M+m)
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A block of mass M is pulled along horizontal frictionless surface by a rope of mass m. Force p is applied at one end of rope Fig.  The force whichthe rope exerts on the block is