A block weighing 87.4 N rests on a plane inclined at θ = 25.5° to the horizontal. The coefficients of static and kinetic friction are 0.200 and 0.100, resp. What minimal force F, parallel to the plane, will keep the block from slipping?

Question

anonymous · Answer

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Just to start off, here's a diagram.

The applied force from the outside must equal the difference between the parallel and frictional force.