In the figure, it F= 20 N, m1 = m2 = 3 kg, and the acceleration is 0.50 m/s2, what will be the tension in the connecting cord? How large is the frictional force on either block?

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!