physics
posted by Lily .
A 4.5 kg body moving in the +x direction at 5.5 m/s collides headon with a 2.5 kg body moving in the x direction at 4.0 m/s. Find the final velocity of each mass for each of the following situations.The collision is elastic.
(4.5 kg mass)
(2.5 kg mass)

use the conservation of momentum, conservation of energy. A bit of algebra will be required.

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