# PHYSICS

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A 0.445 kg ice puck, moving east with a speed of 2.82 m/s, has a head-on collision with a 0.918 kg puck initially at rest. Assuming a perfectly elastic collision, what will be the speed and direction of each object after the collision?

speed of the ice puck ?
Direction: west
speed of the puck ?
Direction:east

• PHYSICS -

start with the conservation of momentum, find one of the velocities in terms of the other. Then substitue that into the energy equation, and ....work ...it ...out. Get a cup of coffee before you start.

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