we can apply an impulse and approximate it to be negligible...[12][12]
(I may be wrong with this one.....but wait)
Can kinetic energy of a system be increased without applying any external force on the system ??
we can apply an impulse and approximate it to be negligible...[12][12]
(I may be wrong with this one.....but wait)
yes , internal forces can change KE of the system, ex, release two charges from rest,they either attract or gets repeled,in both case KE will gets increased