A ball of mass m1 and a block of mass m2 ( m1 > m2)are attached by a lightweight cord that passes over a frictionless pulley of negligible mass as in Figure 1. The block lies on a frictionless incline of angle ϴ. Find the tension in the cord.

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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!