Hollie (40 kg) and Rick (45 kg) ride a toboggan (10 kg) down a hill. When the to

Question

Hollie (40 kg) and Rick (45 kg) ride a toboggan (10 kg) down a hill. When the toboggan reaches the bottom of the slope at B, Hollie gets mad and pushes Rick off the back with a horizontal velocity of 2.0 m/s to the right relative to the toboggan. Use left as the positive direction and neglect friction in all calculations.

A: 7.67m/s
C: 7.672 m/s

Format CheckOK - using as 7.67 m/s

12.65 pts.101%

Format Check

13.75 pts.110%

Hollie (40 kg) and Rick (45 kg) ride a toboggan (10 kg) down a hill. When the toboggan reaches the bottom of the slope at B, Hollie gets mad and pushes Rick off the back with a horizontal velocity of 2.0 m/s to the right relative to the toboggan. Use left as the positive direction and neglect friction in all calculations.

Explanation / Answer

B] (M+m+m')u - m'u' = (M + m)v

=> (10 + 40 + 45)(7.67) - (45 x 2) = (10 + 40)v

=> v = 12.773 m/s

C] velocity of Rick relative to the toboggan is 2 m/s

so, velocity of Rick relative to ground just after he is pushed off will be: 2 + 7.67 = 9.67 m/s to the right.

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