00:02
Hello student, here let's assume that the velocity of the other ball, velocity of this ball is v and it's making an angle theta with the incident ball direction.
00:15
Now, from momentum conservation along the incident direction, we can write 500 into 10 to the power 3 mass of this ball into 1 .5 plus 0 equals to 500 into 10 to the power 3 into 0 .8 cos of 20 degree plus 600 into 10 to the power minus 3 into v cos theta.
00:57
From this we have v cos theta equals to 0 .62.
01:03
Let's name this equation as equation 1.
01:06
Now, again from momentum conservation along the perpendicular direction, along this direction we'll have initial momentum along this direction is 0.
01:19
So, we have 500 into 10 to the power minus 3 into 0 .8 sin 20 degree equals to 600 into 10 to the power minus 3 into v sin theta.
01:39
So, from this we have v sin theta equals to 0 .22.
01:48
Now, from 1 and 2 we have, we solve, we'll have v equals to speed of the other ball is 0 .65 meter per second and its direction theta is 17 degree...