2.2 kg object is whirled ina vertical circle whose radius is 1.0 m. The time of one revolution is 0.97 s. a) what is the tension in the string when the mass is at the top of the circle? b) what is the tension in the string when the mass is at the bottom of the circle?

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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!