Problem 7-23 Work - C

A girl pulls a toboggan of mass $4.81 \;kg$ up a hill inclined at $25.7^\circ$ to the horizontal. The vertical height of the hill is $27.3 \;m$. Neglecting friction between the toboggan and the snow, determine how much work the girl must do on the toboggan to pull it at constant velocity up the hill. [Ans. $1.29\times 10^3\; J$]

No. The normal reaction $N$ is perpendicular to the surface.

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