A non-zero external force acts on a system of particles. The velocity and acceleration of the centre of mass are found to be v 0 and a 0 at an instant t . It is possible that

Question

A non-zero external force acts on a system of particles. The velocity and acceleration of the centre of mass are found to be v 0 and a 0 at an instant t . It is possible that, v 0 = 0 , a 0 = 0, v 0 = 0 , a 0 ≠ 0, v 0 ≠ 0 , a 0 = 0, v 0 ≠ 0 , a 0 = 1

MARKS App · Accepted Answer

If the external force is non-zero then the acceleration of the centre of mass must be non-zero a 0 = F e x t M ≠ 0 . However, at a particular instant of time velocity of the centre of mass may be zero or non-zero. Hence v 0 = 0 , a 0 ≠ 0 From the equation of velocity is in +ve direction and acceleration is in -ve direction, then at some moment velocity will become 0.

Search any question & find its solution

Looking for more such questions to practice?