Question

In the diagram shown, the shaded pulley has mass 2M. A man of mass M pulls the pulley upwards with constant velocity. If friction is not present between the man and the ground then what will be the acceleration of the man? (Neglect friction between pulley and string​

Answer 1

Answer:

Ref. image 1

Since the pulley moves down with constant velocity.

acceleration =0.

Hence by constants,

2

ap.0

=g⇒(ap=2g)

By balancing forces,

2T=mg

on man,

Ref. image 2

The man has to pull the string with acceleration (2g)

hence acceleration of the man =2g

Hence, the option A is correct answer.

solution

Explanation:

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