Question

A 71 kg football player moving 5.5 m/s tackles and collides with a stationary 140 kg football player. What speed will the football players have the moment after impact?

Answer 1

Answer:

mv=m2v2

71*5.5=140*x m/s

x m/s = 71*5.5/140 = 2.78 m/s is the speed at moment after impact