Question

A rubber ball of mass 10g strikes a rigid wall with speed 20m/s and rebounds
with speed 15m/s. If the time of collision is 0.01s, calculate
a. Initial momentum of the ball.
b. Final momentum of the ball.
c. Rate of change of momentum.
d. Magnitude of force impacted on the wall.
e. Acceleration of the ball.

Answer 1

Answer:

Initial normal velocity of ball toward horizontal surface, u=4sin30

o

=2ms

−1

Final normal velocity of ball toward horizontal surface, v=−4sin30

o

=−2ms

−1

Impulse imparted to ball, I=F.Δt=mΔV=m(v−u)=0.1[2−(−2)]=0.4kgms

−1

Change in momentum, P=mΔV=0.4kgms

−1