Answer:
Mass of ball (m) = 200 g = 0.2 kg
Initial velocity of ball (u1) = 10 m s-1
Initial momentum of ball =mu1 = 0.2 kg x 10 m s-1 = 2 N s
Final velocity of ball (u2) = - 5 m s-1
(Minus sign denotes that ball is moving in opposite direction.)
Final momentum of ball =mu2 = 0.2 kg x -5 m s-1 = -1 N s
Change in momentum = Final momentum - Initial momentum
= - 1 N s - 2 N s = - 3 N s.
Minus sign denotes that change in momentum is in the direction opposite to the direction of initial momentum of the ball.
You need to login to perform this action.
You will be redirected in
3 sec