All Flashcards
What is the effect of a constant angular acceleration?
Allows the use of simplified rotational kinematic equations.
What happens if angular acceleration is not constant?
Calculus must be used to analyze the rotational motion.
What is the effect of applying a torque to a rigid object?
It causes angular acceleration, changing the object's rotational speed.
What happens when there is a change in angular velocity?
Angular acceleration occurs.
What happens when a wheel starts from rest and experiences a uniform angular acceleration?
Its angular velocity increases linearly with time, and it rotates through an increasing angular displacement.
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.
Compare linear displacement () and angular displacement ().
Linear displacement: Change in position along a straight line. | Angular displacement: Change in angular position around an axis.
Compare linear velocity () and angular velocity ().
Linear velocity: Rate of change of linear displacement. | Angular velocity: Rate of change of angular displacement.
Compare linear acceleration () and angular acceleration ().
Linear acceleration: Rate of change of linear velocity. | Angular acceleration: Rate of change of angular velocity.
What is the difference between clockwise and counterclockwise rotation in terms of sign convention?
Clockwise rotation: Typically assigned a negative value. | Counterclockwise rotation: Typically assigned a positive value.
When can a rotating system be treated as a single object?
When the system's rotation is well described by its center of mass motion.