Question

If the athlete takes t seconds to go once around the circular path of radius R the velocity V is given by a. V=2πr/t b. V=πr2/t c. V=2r/t d. V=πr/t

Answer 1

Speed will be 2πr/t if athlete takes t seconds to go once around the circular path of radius R

Explanation:

Time taken for one complete  round =  t secs

Radius = R

Circumference of circle = 2πR

Distance covered  =  2πR

As he reaches at same point hence displacement = 0

Velocity = Displacement / Time    = 0/t  =  0  

None of the given option is correct

Speed = Distance / Time  

= 2πR/t

2πr/t

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Answer 2

Answer:

$v2\pir \div t$