- #1

ryanx806

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## Homework Statement

A halfback with a mass m1=90kg is running up field with a speed of v1=7.6m/s. He is tackled by an opponent with a mass of m2=120kg, who approaches the halfback at an angle of 30 degrees with a velocity of v2=4.0m/s. Assume the collision is perfectly inelastic.

a) Calculate the magnitude and direction of the resultant velocity of the two players just after the tackle.

b) Calculate the change in kinetic energy (in Joules) for the system of the two players.

## Homework Equations

I'm confused about calculating the initial momentum of each of the players, and how to add them together to get the final velocity and direction.