10. Two blocks are touching on a frictionless tabletop, as shown in the figure below. The larger block has a mass M₁= 12 kg, and the smaller one has a mass M₂ = 8 kg. A force F=100 N is applied horizontally to the larger block. What is the contact force (in newtons) each block exerts on the other? F M2 MI

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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!