Question

if a cyclist takes one minute to complete half Revolution on a circular path 120 m radius. what is the average velocity

Answer 1

Hey.

Time t = 1 min = 60 s

radius of the path = 120 m

As circumference= 2πr

so, circumference= 2×3.14×120 m

= 753.6 m

As he takes 60 s to complete half revolution

so, distance covered ,d = 753.6/2 = 376.8 m

So, average speed = d/t

= 376.8/60

= 6.28 m/s

But as displacement =Diameter= 2×120 = 240m

and avg. velocity = displacement /time

so, avg. velocity = 240/60 = 4 m/s

Thanks.

Answer 2

velocity= displacement. ÷. time

240. ÷. 60

4m/s

because , radius =120

displacement or diameter = 120×2

=240

time = 1min = 60sec