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FAQs on DC Pandey Solutions: Mechanics of Rotational Motion- 1 - DC Pandey Solutions for NEET Physics

1. What is rotational motion?
Ans. Rotational motion refers to the movement of an object around an axis, such as a wheel rotating on its axle or a planet revolving around the sun. It involves the rotation of an object rather than its linear motion.
2. What is the difference between linear and rotational motion?
Ans. Linear motion involves the movement of an object in a straight line, while rotational motion involves the movement of an object around an axis. In linear motion, all parts of the object move the same distance in the same time, whereas in rotational motion, different parts of the object move different distances in the same time.
3. How is angular velocity different from linear velocity?
Ans. Angular velocity refers to the rate at which an object rotates around an axis, measured in radians per second. It is a vector quantity, indicating both the magnitude and direction of rotation. On the other hand, linear velocity refers to the rate at which an object moves in a straight line, measured in meters per second. It only indicates the magnitude of motion and does not have direction.
4. What is moment of inertia?
Ans. Moment of inertia is a measure of an object's resistance to changes in its rotational motion. It depends on the mass distribution of the object and the axis of rotation. Objects with a larger moment of inertia require more torque to achieve the same angular acceleration as objects with a smaller moment of inertia.
5. How does torque affect rotational motion?
Ans. Torque is the rotational equivalent of force and is responsible for the changes in an object's rotational motion. It causes objects to rotate or change their rate of rotation. Torque depends on both the force applied and the distance from the axis of rotation. The greater the torque applied, the greater the angular acceleration or change in rotational motion.
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