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Posted by on Tuesday, January 25, 2011 at 9:57pm.

A tennis player places a 54 kg ball machine on a frictionless surface. The machine fires a 0.057 kg tennis ball horizontally with a velocity of 38 m/s toward the north. What is the final velocity of the machine?


m/s to the south

  • physics - , Tuesday, January 25, 2011 at 10:50pm

    Total momentum remains zero. After the ball is thrown, ball momentum and machine momentum are equal and opposite.

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