A 23 kg girl is standing on a 20 kg cart on a frictionless
A 23 kg girl is standing on a 2.0 kg cart on a frictionless surface. She is at rest. She then throws a heavy 8.9 kg rock, giving it a speed of 7.5 m/s. What is the final speed of the girl/cart system?
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a 23 kg girl is standing on a 20 kg cart on a frictionless surface she is at rest she then throws a heavy 89 kg rock
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