Question

b) A hockey ball of mass 150 g travelling at 7m/s is struck by a hockey stick so as to return
it along its original path with a velocity at 3 m/s. Calculate the change of momentum
occurred in the motion of the hockey ball by the force applied by the hockey stick.

Answer 1

Answer:

Correct option is

A

−3 Ns

Mass of ball(m)=200g=0.2kg

Initial velocity of ball(u)=10ms

−1

Final velocity of ball(v)=5ms

−1

Therefore, change in momentum (△p) = Final momentum - initial momentum =m(v−u)=0.2×(−5−10)=−3 kgms

−1

=−3 Ns