All Flashcards
Define torque.
Torque is the rotational equivalent of force, causing objects to rotate.
Define angular displacement.
The change in the angle of a rotating object, measured in radians.
Define angular velocity.
The rate of change of angular displacement, measured in radians per second.
Define angular acceleration.
The rate of change of angular velocity, measured in radians per second squared.
Define moment of inertia.
The rotational equivalent of mass, measuring an object's resistance to changes in rotational motion.
Define angular momentum.
The rotational equivalent of linear momentum, measuring an object's tendency to keep rotating.
What is the effect of applying a torque on an object?
It causes the object to undergo angular acceleration.
What happens when the net torque on an object is zero?
The object is in rotational equilibrium; its angular velocity remains constant.
What happens when a figure skater pulls their arms inward?
Their moment of inertia decreases, and their angular speed increases to conserve angular momentum.
What is the effect of increasing the distance from the axis of rotation when applying a force?
It increases the torque, making it easier to cause rotational motion.
What happens if no external torque acts on a rotating system?
The total angular momentum of the system remains constant.
What happens when the moment of inertia increases?
The object becomes more resistant to changes in rotational motion, requiring more torque to achieve the same angular acceleration.
What is angular displacement ()?
The angle, in radians, that a point on a rigid object rotates about a specific axis.
What is angular velocity ()?
The rate of change of angular position with respect to time.
What is angular acceleration ()?
The rate at which angular velocity changes over time.
Define radians.
The standard unit of angular measure, used in rotational kinematics calculations.
What are rigid systems in the context of rotational kinematics?
Systems that maintain their shape, but different points move in different directions during rotation.