angular velocity
- Noun:
- (Physics) The rate of change of angular displacement: Angular velocity is a vector quantity that measures how fast an object rotates or revolves relative to a point, specifically how quickly its angular position changes over time. It is typically expressed in units of radians per second (rad/s) or radians per minute.
- Noun:
- The angular velocity of the Earth's rotation is approximately 7.29 × 10⁻⁵ radians per second.
- To calculate the centripetal force, you need to know the object's mass, radius, and angular velocity.
- The engineer increased the angular velocity of the flywheel to store more kinetic energy.
Instantaneous angular velocity: The angular velocity at a specific instant in time, often found using calculus as the derivative of the angular position function.
- The sensor measures the instantaneous angular velocity of the robotic arm's joint.
Average angular velocity: The total angular displacement divided by the total time taken.
- The average angular velocity of the record player was 33 1/3 rotations per minute.
Angular velocity vector: In three dimensions, angular velocity is represented as a vector where the direction is along the axis of rotation (using the right-hand rule).
- The direction of the angular velocity vector is perpendicular to the plane of rotation.
Angular speed (n): The magnitude of the angular velocity vector, a scalar quantity measuring how fast an object rotates without specifying direction.
- The angular speed of the turbine was constant.
Angular acceleration (n): The rate of change of angular velocity with respect to time.
- A constant torque produces a constant angular acceleration.
- Rotational speed: Often used interchangeably in casual contexts, though technically rotational speed is a scalar (like angular speed).
- Rotational velocity: A less common but acceptable synonym emphasizing rotational motion.
To have a high angular velocity: To rotate very quickly.
- A drill bit must have a very high angular velocity to be effective.
To conserve angular velocity: In a closed system with no external torque, angular velocity can remain constant.
- The spinning ice skater conserves angular momentum, not angular velocity, when she pulls her arms in.
- (physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute