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DakE_FeatH
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Homework Statement
A window washer of mass M is sitting on a platform suspended by a system of cables and pulleys as shown. He is pulling on the cable with a force of magnitude F. The cables and pulleys are ideal (massless and frictionless), and the platform has negligible mass.
Homework Equations
Fnet=ma
FG=mg
3. The Attempt at a Solution [/b
I said the forces that are pulling the window washer up consist of a force equal to F and a force equal to the tension in the string attached to the platform.
Then, I took into calculation all the forces acting on the washer, which are the platform, the Earth and the cable.
I know that T is upward and F down, and T=|-F|
I need F
I am thinking Fnet is FN + T - FG - F
And I am really stuck :(