Question

A billiard ball of mass 0.3kg hits a cushion with a velocity of 2.5m/s.Ut rebounds off the cushion in the opposite direction of -2.4ms‐1. a)What is the initial momentum of the billiard ball b)What is the final momentum of the billiard ball?​

Answer 1

Hey there!

LINEAR MOMENTUM = MASS x VELOCITY

As we know , linear momentum varies with direction :

hence, the final and initial momentum will vary .

• INITIAL MOMENTUM : m x v

                                            = 0.3 x 2.5

                                            = 0.75 kgm/s

• FINAL MOMENTUM = m x v

                                          = 0.3 x  (-2.4)

                                          = - 0.72kgm/s

                                 HOPE IT HELPS !