A 90.0-kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s.
(a) Why does the tackle constitute a perfectly inelastic collision?
(b) Calculate the velocity of the players immediately after the tackle and
(c) determine the mechanical energy that is lost as a result of the collision.
(d) Where did the lost energy go?