Question

if a cyclist takes one minute to complete half of the revolution <br />on a circular part of 120 m radius the the average velocity <br />of the person​

Answer 1

Answer:

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

Step-by-step explanation:

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Answer 2

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Hey.

$\bf\pink{Time t = 1 min = 60 s}$

• 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