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Q.

A painter of mass M stands on a platform of mass m and pulls himself up by two ropes which

            hang over pulley as shown. He pulls each rope with force F and moves upwards with a uniform

            acceleration ‘a’ find ‘a’ neglecting the fact that no one could do this for long time

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a

4FM+m−g

b

3FM+m−g

c

3FM−m+g

d

4FM−m+g

answer is A.

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Detailed Solution

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∴a=4TM+m−g Given tension T=⇒a=4TM+m−g

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