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?
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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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