 # JEE Main Rotational Motion Revision Notes  View Notes

A rotation is defined as a circular movement of an object around a center or at a point of rotation. An object which is three-dimensional can always be rotated about an infinite number of imaginary lines which are called rotation axes. If the axis passes through the center of mass of the body, the body is said to be rotating upon itself or spinning. Rotation around an external point, for example, the planet Earth which revolves around the Sun, is called a revolution or an orbital revolution, especially when it is produced by gravity. This axis is termed as Pole.

1. What is the Rotational Law of Motion?

Newton’s second law, the rotational motion states that the relation between the net angular acceleration of a body about a fixed axis and torque, the result of it looks similar to the second law of newton in linear motion along with a few modifications.

2. Give an Example of Rotational Motion.

A person performing somersault is an example of rotational motion. Opening a cap of a soda bottle because of the pressure released it pumps in the air it is also an example of rotational motion. Hand blenders, fans in the house, table fans are all examples of the rotational motion.

3. Is Rotational Motion a Difficult Topic for JEE Main?

No, rotational motion is not a difficult topic for JEE Main, but the questions can be tricky. In physics rotational motion can occasionally daze with a nice little whirl and hence performs justice to its name, angular momentum conservation regarding problems are among the roughest in the mechanics. In JEE Main, theory questions from rotational motion, with very similar options may be expected, so students must learn this concept properly.

4. What is the Importance of Rotational Motion?

In almost all concepts of physics the rotational inertia is important that involves a mass in rotational motion it is used to calculate angular momentum and allows us to explain via conservation of angular momentum when the distribution of mass changes then how rotational motion changes.

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