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Hello, I've been having difficulty with this question...

1. The problem statement, all variables and given/known data

A 25.6kg child pulls a 4.81kg toboggan up a hill inclined at 25.7° to the horizontal. The vertical height of the hill is 27.3 m. Friction is negligible. Determine how much work the child must do on the toboggan to pull it at a constant velocity up the hill.

2. Relevant equations

W=FD COS (ANGLE)

3. The attempt at a solution

I tried using the equation above...and i tried adding the masses ...I got the wrong answer. The force, I used F=mg

w=mgd cos (angle)

=(4.81) (9.8) (27.3) cos (25.7)

=1.15 x 10^3 J

the answer 1.29 x 10^3 J but i'm not geting that...

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# Homework Help: Work and energy difficulty

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