Question

How is circular motion different from rotatory motion?Give an example to support your answer.

Answer 1

If a body or a particle move in the circular path the motion is said to be a circular motion. In circular motion the particle or a body moves around a point which is not on the particle or the body in the circular motion. Example a toy train on a circular track has circular motion.  Rotatory Motion The motion of an object is said to be rotatory if the particles of the object rotate in a circular path with respect to an imaginary axis, known as the axis of rotation. The axis of rotation can be either inside or outside the body of the object that is spinning For something to have 'rotation ftal motion,' it has to actually have something that it's rotating around (called an axis).  In general, a toy train on a track does not have an axis that it's rotating around, so it would not have rotational motion.  A wheel on a car, however, rotates around the car's axle, so it does have rotational motion. What is the difference between circular motion and rotational motion?

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Shraddha Kishan Tripathi, B.Tech. Computer Science and Engineering, National Institute of Technology, Nagaland (2021)

Answered Sep 16, 2017 · Author has 84answers and 120.4k answer views

The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body’s centre of mass and the axis of rotation remains fixed.

In rotatory motion, a body rotates on its own axis (passing through it) while in circular motion, any body/particle moves on a circular path with centre outside the body.

For Example:

If a ceiling fan is running, we say the fan (as a whole) is rotating, while any part of it (like the end of a blade) is moving in a circular path around the central axis.

OR

The earth is rotating around its own axis, while we the humans, the animals, and everything else is undergoing circular motion around the earth’s axis of rotation.

Answer 2

Answer:

Example a toy train on a circular track has circular motion. ... The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body's centre of mass and the axis of rotation remains fixed.

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