Question: 4 . A dock and a plank measuring 5 m x 2 m are subjected to a force of 5 0 N at a constant

4. A dock and a plank measuring 5 m x 2 m are subjected to a force of 50 N at a constant angle \alpha . The coefficient of static friction between the plank and the dock is 0.3. Calculate the angle \alpha at which the plank starts to slide.
4 . A dock and a plank measuring 5 m x 2 m are

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