3) The mass of the moon and earth is 7.4 x 1022 kg and 5.98 × 1024kg respectively. The earth-moon distance REM, is 3.8 x 108m. What is the acceleration of the moon towards earth? What is the speed of the moon as it orbits the earth? (Assume its motion is circular)

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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!