Question

A ball of mass 1 kg is thrown up with an initial speed of 4 m/s. A second ball of mass 2 kg is released from rest from some height as shown in figure. Choose the correct statement(s)

• A. the centre of mass of the two balls comes down with acceleration g/3.
• B. the centre of mass first moves up and then comes down.
• C. the acceleration of the centre of mass is g downwards.
• D. the centre of mass of the two balls remains stationary.

Answer 1

Answer: (B), (C)

The correct options are
B the centre of mass first moves up and then comes down.
C the acceleration of the centre of mass is g downwards.