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A 65 kg person throws a .045 kg snowball forward with a ground speed of 30 m/s.

ID: 1962332 • Letter: A

Question

A 65 kg person throws a .045 kg snowball forward with a ground speed of 30 m/s. A second person, with a mass of 60 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.5 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard friction between the skates and the ice.

Explanation / Answer

considering first person and snow ball conservation of momentum. (m1+m2)u = m1v1 + m2v2 m1v1 is of man and m2v2 is of ball. => velocity of 1st man v1 = 1.85m/s now considering second man and ball. conservation of momentum. m1u1 + m2u2 = (m1+m2)v m1u1 is of man and m2u2, is of ball. => v = 0.022m/s

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