A 20-g mass is moving in the +x-direction at 50 cm/s, while a 4.0-g mass is moving in the –x-direction at 20 cm/s. They collide head on and after the collision the 20-g mass moves in the -x-direction at 30cm/s. Find the final velocity of the 4.0-g mass. Assume negligible friction.

A 20-g mass is moving in the +x-direction at 50 cm/s, while a 4.0-g mass is moving in the –x-direction at 20 cm/s. They collide head on and after the collision the 20-g mass moves in the -x-direction at 30cm/s. Find the final velocity of the 4.0-g mass. Assume negligible friction.

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Question

A 20-g mass is moving in the +x-direction at 50 cm/s, while a 4.0-g mass is moving in the –x-direction at 20 cm/s. They collide head on and after the collision the 20-g mass moves in the -x-direction at 30cm/s. Find the final velocity of the 4.0-g mass. Assume negligible friction.

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