1. Tardigrade
  2. Question
  3. Physics
  4. Two bodies, A and B initially, at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is v and that of B is 2v, the speed of the centre of mass of the bodies is:

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Two bodies, A and B initially, at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is v and that of B is 2v, the speed of the centre of mass of the bodies is:

KEAMKEAM 2000

Solution:

When the sum of the external forces acting on a system vanishes, the velocity of the centre of mass of the system remains constant. In this case the two bodies move under mutual force of attraction, hence speed of centre of mass of the bodies is zero.