Question: A 3 0 , 0 0 0 - k g freight car is coasting at 0 . 8 5 0 m s with negligible friction

A 30,000-kg freight car is coasting at 0.850ms with negligible friction under a hopper that dumps 110,000 kg of scrap metal into it.(a) What is the final velocity of the loaded freight car? (b) How much kinetic energy is lost?
A 3 0 , 0 0 0 - k g freight car is coasting at 0

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