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SilentWind12

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## Homework Statement

A child pulls a trolley by the handle along a ﬂat sidewalk. She exerts a force of 80.0 N at an angle of 30.0° above the horizontal while she moves the wagon 12 m forward. The force of friction on the trolley is 34 N.

## Homework Equations

(a) Calculate the mechanical work done by the child on the trolley.

(b) Calculate the total work done on the trolley

## The Attempt at a Solution

W=F(cos)

80 cos(30)[/B]

W=Fcosdeltad

W=80 N(cos30)(12)

=148J

b)Idk how to do it.