A 0.30 kg is twirled clockwise at the end of a string in a horizontal circle with a radius of 2.2 meters. It takes 8.0 seconds for the mass to go around its circular path 5 times  calculate the period of the motion the distance the mass travels as it goes around once the speed of the mass the acceleration of the mass the force the string applies to the mads

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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!