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A skater of mass 74.0 kg initially moves in a straight line at a speed of 4.60 m/s. The skater approaches a child of mass 45.0...Asked by sally
A skater of mass 74.5 kg initially moves in a straight line at a speed of 5.10 m/s. The skater approaches a child of mass 37.5 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
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Answered by
drwls
Linear momentum along the straight line is conserved, assuming neglible skate friction during the lift,
74.5*5.10 m/s = (74.5 + 37.5)* Vfinal
Solve for Vfinal.
Vfinal = 5.10 m/s(74.5/112)= 3.39 m/s
74.5*5.10 m/s = (74.5 + 37.5)* Vfinal
Solve for Vfinal.
Vfinal = 5.10 m/s(74.5/112)= 3.39 m/s
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