Work done:

$\overline{){\mathbf{W}}{\mathbf{=}}{\mathbf{F}}{\mathbf{\xb7}}{\mathbf{d}}}$

The horizontal components of the forces sum up to zero.

Only the vertical components of the force do work.

The two ropes seen In the figure are used to lower a 255 kg piano 6.00 m from a second-story window to the ground.

How much work is done by each of the three forces ?

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