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
-
A.
20.0kg ms-1 -
B.
10.0kg ms-1 -
C.
5.0kg ms-1 -
D.
1.3kg ms-1 -
E.
0.0kg ms-1.
Correct Answer: Option A
Explanation
Impulse = Ft = mu – (-mu)
= mu + mu = 2mu = 2 x 5 x 2 = 20kgms-1