Conservation of Momentum

  • Thread starter rueberry
  • Start date
  • #1
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I have been working on this for some time, maybe I'm just using the wrong formula.

A 120 kg tackler traveling 3 m/sec tackles a 75 kg halfback running 6m/sec in the opposite direction. What is their common speed immediately after the collison?

Thank you.
 

Answers and Replies

  • #2
Use the formula

(M1 x U1) + (M2 + U2) = (M1 x V1) + (M2 x V2), Conservation of momentum forumla.

where M1 = Tackler Mass
M2 = Halfback Mass
U1 = Tackler Speed
U2 = Halfback speed
V1 = V2 (since the speed after colision is common) = Speed of both of them after the collision.
 

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