posted by Allie .
A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by a 93.0-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.
direction ° north of east
(c) Determine the mechanical energy that is lost as a result of the collision.
(d) Where did the lost energy go?