Billy Joe pulled a large block of wood is across a frozen lake at a constant velocity. The block's mass is 30.0 kg. The coefficient of friction between two surfaces is small: μ k = 0.05. What is the force of tension that is acting on the block of ice?

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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!