00:01
In this question, we have elastic collision between two balls.
00:07
Okay, and then we want to find out.
00:11
So the collision is like this.
00:16
M1 is moving toward m2, m2 is initially at rest.
00:20
After the collision, m2 moves at half v1i.
00:24
And we want to find out what is m2 and also the fraction of kinetic energy, transfer to m2.
00:32
Okay, okay, solution.
00:38
Okay, so this is a conservation of momentum problem, and this collision is elastic, as mentioned by the problem.
00:48
Okay, so we can write down a few equations.
00:51
First, using conservation of momentum.
01:02
Okay, we have m1, v1i, plus m2, n2i, it goes to m1, v1f, f plus m2 v2 f okay so we're going to take positive the right is the positive direction and we have elastic collision okay this means we have another equation that we can use okay the equation is relative speed of approach is equal to relative speed of separation.
01:47
So what we have here is v1i minus v2i is equal to v2f minus v1f...