If a shell at rest explodes, then, the centre of mass of the fragments
remains at rest
moves along a straight line
moves along an elliptical path
moves along a parabolic path
As the centre of mass is initially at rest, it will remain at rest.
A shell following a parabolic path explodes somewhere in its flight. The centre of mass of fragments will continue to move in
A body starts from rest and moves along a straight line path with uniform acceleration . What is the ratio of velocities at t =1s and t=2s ?