Question

If a cyclist takes one minute to complete half of the revolution on a circular path of 120 m radius, then the average velocity of the person is ​

Answer 1

After half revolution, the cyclist will be on the opposite side of the diameter from the point where he started

So his displacement = diameter = 2×120m=240m

time taken is 1min=60s so average velocity v=

60

240m

=4m/s

So, the correct answer is '4m/s'.

Answer 2

Answer:

Explanation:

After half revolution, the cyclist will be on the opposite side of the diameter from the point where he started

So his displacement = diameter = 2×120m=240m

time taken is 1min=60s so average velocity v=  240m/ 60  =4m/s

So, the correct answer is '4m/s'.

to explain in detail

Given :

Radius =R=120m

Time=T=60 sec

As the object covers half revolution of circle, so the displacement till be the diameter of the circle.

Displacement is the shortest path between source and the destination.

Average Velocity=Displacement/ Time

=2R/T

=2x120/60

=4m/s

∴Average velocity= 4m/s