# physics

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How much work is done by the boy pulling his sister d = 25.0 m in a wagon as shown in figure below? Assume no friction acts on the wagon and he pulls with a force of 65.0 N and at an angle θ = 31.0°.

• physics -

F' = F*Cos A = 65*Cos31 = 55.7N = Hor. component = Component that pulls the wagon.

Work = F'*d.

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