00:01
Hello everyone so let's start with the question as you can see that there is a snooker pole okay, so in snooker pole there is balls placed here like this okay now here is ball black ball okay, so to hit this ball we use bilats okay, so as this is our means if i divide into two parts this is our ball this is our ball before hitting the ball and this is after hitting the ball.
00:36
So as you know that this is the condition of, this is the condition of elastic collision.
00:48
Okay.
00:49
And in elastic collision as you know that our kinetic energy, kinetic energy transferred, okay, and our momentum is conserved.
01:09
Okay.
01:10
So in a question, there is a rolling ball with on a table, okay? there is a pool table.
01:15
Has a momentum of p1 okay that is p one now after it hits the stationary ball that is it's our stationary stationary ball after hitting they starts rolling considering the friction negligible our friction is zero so what will happen to the momentum of the first ball so we have to find the momentum of the first ball okay okay now here as you see it is a condition of elastic collision so in the elastic collision our transfer transfer energy will be there and momentum is conserved.
01:48
So here the momentum is conserved means change in p equal to 0.
01:52
And change in p is minus means pi minus pf that is initial momentum minus final momentum.
02:00
So p initial equal to p final that is initial momentum equal to final momentum.
02:06
Now we know the formula of momentum that is product of mass and velocity...