00:01
First going to apply for part a, the conservation of momentum.
00:04
And we can say that 0 .45 kilograms multiplied by the velocity of the ball final plus 60 kilograms multiplied by the velocity of the player final.
00:17
This would be equaling 0 .45 kilograms times the initial velocity of the ball negative 25 meters per second.
00:27
And then plus 60 kilograms times the initial.
00:30
Velocity of the player, we know to be positive 4 .0 meters per second.
00:36
And so we can then say that the velocity of the player final would be equaling 3 .8 meters per second minus 7 .5 times 10 to the negative third multiplied by the final, the final velocity of the ball.
00:56
So for the, for an elastic collision, we know that the velocity of the, the ball final minus the velocity of the player final will be equal to the negative velocity of the ball initially minus the velocity of the player initially.
01:13
And so we know that this is going to be equaling to negative negative 25 minus 4 .0 meters per second.
01:26
And so we can then say that the velocity of the ball final would be equaling 29 meters per second plus the final velocity of the player...