Rotational Dynamics Physics Class 12 Quiz
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Rotational Dynamics Physics Class 12 Quiz

Test your understanding of rotational dynamics with this quiz covering circular motion, centripetal force, centrifugal force, angular velocity, displacement, and angular acceleration. Perfect for Maharashtra Board Class 12 students following the new syllabus.

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Questions and Answers

Define circular motion?

Circular motion is the movement of an object along a circular path.

Define centripetal force and centrifugal force?

Centripetal force is the force that keeps an object moving in a circular path, directed towards the center of the circle. Centrifugal force is a fictitious force that appears to act on an object moving in a circular path, directed away from the center of the circle.

Differentiate between centripetal force and centrifugal force?

Centripetal force is a real force that keeps an object moving in a circular path, while centrifugal force is a perceived force that appears to act on the object, but is actually the result of inertia.

Define angular velocity, displacement, and angular acceleration?

<p>Angular velocity is the rate of change of angular displacement. Angular displacement is the angle through which a point or line has been rotated in a specified sense about a specified axis. Angular acceleration is the rate of change of angular velocity with respect to time.</p> Signup and view all the answers

Study Notes

Circular Motion

  • Circular motion occurs when an object moves in a circular path around a fixed point, called the center of rotation.
  • The object's velocity is constantly changing, but its speed remains constant.

Forces in Circular Motion

  • Centripetal Force: A force that keeps an object moving in a circular path, directed towards the center of rotation.
  • Centrifugal Force: A fictitious force, apparent when an object is moving in a circular path, directed away from the center of rotation.

Centripetal vs. Centrifugal Force

  • Centripetal force is a real force, acting towards the center of rotation, responsible for keeping the object on its circular path.
  • Centrifugal force is a fictitious force, only apparent when the object is rotating, and is directed away from the center of rotation.
  • Both forces are perpendicular to the velocity of the object.

Angular Quantities

  • Angular Velocity: The rate of change of angular displacement, measured in radians per second (rad/s).
  • Angular Displacement: The angle through which an object rotates, measured in radians (rad).
  • Angular Acceleration: The rate of change of angular velocity, measured in radians per second squared (rad/s²).

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