A block is on a frictionless table, on the Earth. The block accelerates at 6.8 m/ when a 18 N horizontal force is applied to it. The block and table are set up on the Moon where the acceleration due to gravity is 1.62 m/ . A horizontal force of 5.8 N is now applied to the block when it is on the Moon. What is the acceleration imparted to the block by this force?

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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!