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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...Question
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?
Answers
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