A body moves anticlockwise along the circumference of the circle of radius 20 m with constant speed and takes 12 s to complete one rotation. Find the distance travelled and displacement of the body after 9 s of its motion.
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The distance around a circle is equivalent to a circumference and calculated as 2•pi•R where R is the radius. The time for one revolution around the circle is referred to as the period and denoted by the symbol T. Thus the average speed of an object in circular motion is given by the expression 2•pi•R / T.
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