Define uniform circular motion. Explain with the help of a diagram why is it called an accelerated motion? Give an example of this kind of motion.

B) Give an expression for the speed of an athelete if he takes time t to go around a circular track of radius 'r'

C) A Cyclist takes five round of a circular track of diametere 196M is 25 min. Calculate his speed.

A body moving in a circular path with a constant speed or a constant angular velocity is said to be in a uniform circular motion.

As we know, a force called centripetal force is always required to keep a body in a circular path. This force results in an acceleration called centripetal acceleration. Centripetal acceleration is directed along the radius and towards the center of the circular path.

So, uniform circular motion is also an accelerated motion.

The motion of the moon around the earth can be considered an example of uniform circular motion.

 

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