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A(n) 1.3 kg mass sliding on a frictionless surface has a velocity of 7.1 m/s east when it undergoes a one-dimensional elastic collision with an unknown mass that is initially at rest. after the collision the velocity of the 1.3 kg is 1.7 m/s west. what is the unknown mass? answer in units of kg
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A(n) 1.3 kg mass sliding on a frictionless surface has a velocity of 7.1 m/s east when it undergoes...
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