A 0.060 kg tennis ball moving with the speed of 2.50 m/s, collides head-on with a 0.090 kg ball initially moving away from it at a speed of 1.15 m/s. Assuming a perfectly inelastic collision, what are the speed and direction of each ball after the collision?
a
1.50 m/s same direction of the tennis ball's initial motion
b
1.69 m/s same direction of the tennis ball's initial motion
c
2.25 m/s opposite direction of the tennis ball's initial motion
d
1.85 m/s opposite direction of the tennis ball's initial motion
