A4.0-kg mass, initially at rest on a horizontal frictionless surface, is struck by a 2.0-kg mass moving along the x axis with a speed of 8.0 m/s. after the collision, the 2.0-kg mass has a speed of 4.0 m/s at an angle of 37° from the positive x axis. what is the speed of the 4.0-kg mass after the collision?
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A4.0-kg mass, initially at rest on a horizontal frictionless surface, is struck by a 2.0-kg mass mov...
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