the minimum force required to lift an object when a force is applied at an angle theta on the object on a rough surface.
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The minimum force required to start pushing a body up a rough (frictional coefficient μ) inclined plane is f1 while the minimum force needed to prevent it from sliding down is F2. If the inclined plane makes an angle θ with the horizontal such that tanθ=2μ, then the ratio is.
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