Question

an athlete completes one round of a circular track of diameter 200 m in 40 seconds what will be the distance covered and the displacement at the end of 2 minute.20seconds?

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Answer 1

diameter = 200              radius = 100

The distance travelled in 40 seconds= length of the track = circumference of the circle.
                                    =2[tex] \pi [/tex] r
                                    = 2 * 3.14 * 100
                                    = 2 * 314
                                    = 628
distance travelled in 20 secs = 628/2 = 314 m

distance between the starting point and ending point in 20secs = 200m

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