Estimate the acceleration due to gravity at the surface of Europa (one of the moons of Jupiter) given that its mass is 4.9 x 1022 kg and making the assumption that its mass per unit volume is the same as Earth's. Express your answer to two significant figures and include the appropriate units. ? gEuropa = Value Units

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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!