Question

Q 66 A ball of mass 200 grams is thrown at an inclination of 30° to the horizontal at a wall with 25m/s and it bounces off the wall again with the exact same
inclin tion. Given that the coefficient of restitution = 0.9 and that the impact time at the surface was 0.1 seconds, the coefficient of friction at the wall surface
must be:
Ops: A.
B.
C
D.
0.3
0.45
0.35
0 0.4​

Answer 1

Answer:

1. ans of this question is 0.45