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A 95kg fullback, running at 8.2m/s, collides in midair with a 128-kg defensive tackle moving in the opposite direction. Both players end up with zero speed.

a) what was the fullbacks momentum before the collision...(I came up with 779-kg*m/s)

B) what was the change in the fullbacks momentum?

C) what was the change in the tackles momentum?

D) what was the tackles original momentum?

E)how fast was the tackle originally moving?