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Q.

A block of mass 10 kg lying on a smooth horizontal surface is being pulled by means of a rope of mass 2 kg. If a force of 36N is applied at the end of the rope, the tension at the mid point of the rope is,

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a

30 N

b

33 N

c

24 N

d

12 N

answer is A.

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Detailed Solution

The rope and the block will move with an acceleration of 3m/s2.

The tension at the mid point of the rope is responsible for the acceleration of half of the rope and the block.

T=(M+m)a=(10+1)3=33N.

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