A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms-1 and rebounds with the same speed. Determine the impulse experienced by the ball
-
20.0kg ms-1
- 10.0kg ms-1
- 5.0kg ms-1
- 1.3kg ms-1
- 0.0kg ms-1.
The correct answer is: A
Explanation
Impulse = Ft = mu - (-mu)= mu + mu = 2mu = 2 x 5 x 2 = 20kgms-1