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Bumper car A (281 kg) moving +2.82 m/s makes an elastic collision with bumper car B (209 kg) moving +1.72 m/s. What is the velocity of car B after the collision? HELP ASAP!!

Bumper car A 281 kg moving 282 ms makes an elastic collision with bumper car B 209 kg moving 172 ms What is the velocity of car B after the collision HELP ASAP class=