Topic Content:
- Circular Motion
What is Circular Motion?
Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path.
It can be uniform with a constant angular rate of rotation and constant speed or non-uniform with a changing rate of rotation.
For example, an artificial satellite orbiting the earth at a constant height, a ceiling fan’s blade rotating around a hub, a stone which is tied to a rope and whirled in circles, a car turning through a curve in a race track, planets moving around the sun.
If acceleration is the time rate of change of velocity, a change in the direction of velocity also constitutes a change in magnitude of the acceleration.
The acceleration is always directed towards the centre of the circular path and this is called centripetal acceleration.
a = \( \frac {v^2}{r}\)
v = velocity of the object, and it is always directed along the tangent to the circle at any point of the path.
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