00:01
The collision occurs between two moving billiard balls such that no external force acts on the two ball system.
00:06
Okay, suppose we have two billiard balls placed on this and they are moving and they collide each other.
00:14
It is said that no external force acts on this system.
00:19
So, f external is zero as for the question.
00:24
Next, is the linear momentum of each ball conserved in the collision? see, the linear momentum is mv.
00:33
So, after collision, what is asked is the linear momentum of each ball conserved in the collision.
00:42
So, linear momentum in the collision means before collision, after collision, everything we have to consider, right? so you see the velocity of all 1 and ball 2 will surely change after collision...