An 88.5 kg fullback moving east with a speed of 5.5 m/s is tackled by a 94.0 kg opponent running west at 2.90 m/s, and the collision is perfectly inelastic.

Question

(a) Calculate the velocity of the players just after the tackle.
m/s
(b) Calculate the decrease in kinetic energy during the collision.
J

Answer 1

m₁v₁-m₂v₂=(m₁+m₂)u
u =(m₁v₁-m₂v₂)/(m₁+m₂)= …
ΔKE=m₁v₁²/2 + m₂v₂²/2 -(m₁+m₂)u²/2=..