A 91.0-kg fullback running east with a speed of 5.20 m/s istackled by a 95.0-kg opponent running north with a speed of 3.00m/s.
(a) Explain why the successful tackle constitutes a perfectlyinelastic collision.
(b) Calculate the velocity of the players immediately after thetackle.
| magnitude    | m/s |
| direction    | ° north of east |
(c) Determine the mechanical energy that disappears as a result ofthe collision.
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(d) Account for the missing energy.
