Question

A person completes one round of a circular track of
diameter 200m in 20s what will be the speed
and
velocity end of 1 minute 20 sec?
​

Answer 1

Answer:

Radius of the track = 100m

Perimeter of track = 2πr

= 2(3.14)(100)

= 628m

Time taken = 1min 20sec

= 60 + 20 seconds

= 80 seconds

Speed = Distance/Time

= 628/80

= 7.85 m/s

Velocity = Displacement/Time

= 0/80

= 0 m/s

Displacement is zero as he comes to the starting point after one round.

Speed is 7.85m/s

Speed is 7.85m/s Velocity is 0m/s