Question

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

Answer 1

This should do it. m/s can also be written as ms^-1

Answer 2

3.142m/s

Step-by-step explanation:

Given parameters:

Radius of the circle = 1m

Time = 2s

Unknown:

Speed = ?

Solution:

Speed is the rate of change of distance with time.

Speed =
`(distance)/(time)`

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 =
`(2\pi )/(2)`

Speed = π = 3.142m/s