Mathematics, 18.12.2020 16:50, ian2006huang

Please, help me!! A block of wood weighing 18 pounds rests on an inclined plane that makes an angle of 60 with the horizontal. How much of the friction force is needed to prevent the block from sliding on the plane?

___lb.

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Please, help me!! A block of wood weighing 18 pounds rests on an inclined plane that makes an angle...