Answer:
that one i know only pe not that sorry again
Impulse = Change in momentum.
The ball was moving with a momentum of 0.45 * 22 = 9.9
The ball comes to rest in the receivers arm; this means the ball's final velocity = 0. So mv2 = 0.45 * 0
The magnitude of the impact is just the change in momentum. 9.9 - (0.45 * 0) = 9.9
The letter that answers this question correctly is E .
Answer:
Explanation:
1) The moment of inertia of the grindstone is: