A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 56.2° and a speed of v1 = 24.8 m/s. It bounces off at an angle of θ2 = 71.0° and a speed of v2 = 10.0 m/s.

Question

(a) What is the magnitude of the change in momentum of the billiard ball?


(b) In which direction does the change-of-momentum vector point? (Let up be the +y positive direction and to the right be the +x positive direction.)

Im confused on the momentum part becuase i know the change is momentum is momentum final subtracted by momentum initial but the angles are throwing off the outcome of my answer.

Answer 1

Just a quick question…

Did this problem come with a figure?

I can't tell if those angles are along the horizontal or vertical.

Answer 2

It does but i don't know how to get it in the box