(Solution) - A plank of mass m1 with a bar of mass m2 placed on it lies -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A plank of mass m1 with a bar of mass m2 placed on it lies on a smooth horizontal plane. A horizontal force growing with time t as F = at (? is constant) is applied to the bar. Find how the accelerations of the plank w1 and of the bar w2 depend on t, if the coefficient of friction between the plank and the bar is equal to k. Draw the approximate plots of these dependences.