A body moves on a circular path of radius 1m. It completes one circle in 2 sec find its speed

3.142m/s

Explanation:

Given parameters:

Radius of the circle  = 1m

Time = 2s

Unknown:

Speed  = ?

Solution:

Speed is the rate of change of distance with time.

       Speed  =

In a circular path;

       distance  = circumference of the circle

      Circumference of a circle  = 2πr

Insert the radius and find the circumference;

      Circumference  = 2 x π x 1  = 2π

So, speed  =

      Speed  = π = 3.142m/s

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