Question

Define uniform circular motion. Is the uniform circular motion accelerated? If yes why?

Answer 1

Answer:

Uniform Circular Motion

When an object moves in a circular path with uniform speed, its motion is called uniform circular

motion.

• When a body moves along a circular path then its direction of motion (or direction of speed)

keeps on changing continuously. Therefore, motion along a circular path is said to be

accelerated.

• To calculate the speed of a body in uniform circular motion

A body moving around a circular path travels a distance equal to its ‘circumference’ in one

round We know, circumference of a circle of radius(r)= 2πr.

If the body takes t seconds to go once around the circular path of radius r,

then velocity (v) = 2πr

                        t

Examples of uniform circular motion

1. Motion of an artificial satellite around the earth

2. Cyclist moving uniformly over a circular track.

3. A small piece of stone tied to a string and rotated in a circle with uniform speed.