Question

A rod of mass M-m ' carries an insect of mass m' at its bottom end and its top end is connected with a string which passes over a smooth pulley and the other end of the string is connected to a counter mass M .Initially the insect is at rest.Choose the correct option(s).​

Answer 1

Answer:

ILLUSTRATION 1.20 A rod of mass 'M-m' and length I carries an insect of mass 'm' at its bottom end and top end is connected with a string which passes over a smooth pulley and other end of the string is connected to a counter weight of mass 'M. Initially the insect is at rest. Rod (M-m) Counterweight (M) Insect If we consider 'insect + rod + counter weight' as system. (a) Is there any net external force acting on the system initially? (b) If the insect starts crawling up on the rod with constant velocity, whether the centre of mass of the system accelerates or not? (c) If the insect moves up with acceleration, does the centre of mass of the system accelerate? (d) Find the displacement of centre of mass of the system when the insect reaches to the other end of the rod. (e) Find the displacement of the rod when the insect reaches the other end of the rod.

Explanation:

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