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A man is pushing on a 50 kg box that is sitting stationary on a ramp inclined at 55 0 . The coefficient of static friction is 0.

A man is pushing on a 50 kg box that is sitting stationary on a ramp inclined at 550.  The coefficient of static friction is 0.11.  What is the minimum force the man has to apply to the box to keep it stationary?

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