Question

A ball of mass 100 g is moving with a velocity of 3.5 ms-1. A constant force is applied for 1.5 s and the ball acquires a velocity of 33.5 is-1. Calculate the rate of change of momentum of the ball. What is its equivalent physical quantity?

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

solution