Question

If the radius of a circular track is 49m an athlete complete one around of circular track in 40 second find
(1)speed
(2)velocity of athlete
​

Answer 1

Answer:

1)7.7 m/s or 27.7 km/hr 2)0

Explanation:

1)average velocity⇒here the distance of covered by the athlete can be found by using the formula distance= 2×π×radius which gives the distance s 308 m.now,speed=distance/time which when substituted and simplified gives the answer 7.7 m/s or 27.7 km/hr.

2)average velocity⇒here the athlete came to the same position which means displacement of the athlete is 0.when the displacement is 0 the velocity will also be zero.

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