Question
Explain the term uniform circular motion.
✓
Answer
- The motion of a body along the circumference of a circle with constant speed is called uniform circular motion.
- The magnitude of velocity remains constant and its direction is tangential to its circular path.
- The acceleration is of constant magnitude and it is perpendicular to the tangential velocity. It is always directed towards the centre of the circular path. This acceleration is called centripetal acceleration.
- The centripetal force provides the necessary centripetal acceleration.
- Examples of U.C.M:
- Motion of the earth around the sun.
- Motion of the moon around the earth.
- Revolution of electron around the nucleus of atom.
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