All Flashcards
What is the effect of applying a net torque to an object?
The object experiences angular acceleration.
What happens if the net torque acting on an object is zero?
The object's angular velocity remains constant (no angular acceleration).
What happens if you double the net torque applied to a rigid system?
The angular acceleration of the system doubles.
What is the effect of doubling the rotational inertia of a rigid system, given a constant net torque?
The angular acceleration of the system is halved.
What happens when a force is applied farther from the hinge of a door?
The torque applied to the door increases, resulting in a greater angular acceleration.
What is the difference between linear and angular velocity?
Linear velocity: Describes the rate of change of an object's position in a straight line. Angular velocity: Describes the rate of change of an object's angular position during rotation.
How does linear inertia differ from rotational inertia?
Linear inertia (mass): Resistance to changes in linear motion, depends only on mass. Rotational inertia: Resistance to changes in rotational motion, depends on mass and its distribution relative to the axis of rotation.
Compare linear and angular acceleration.
Linear acceleration: The rate of change of linear velocity. Angular acceleration: The rate of change of angular velocity.
Compare force and torque.
Force: A push or pull that causes linear acceleration. Torque: A twisting force that causes angular acceleration.
What is the difference between linear momentum and angular momentum?
Linear momentum: Mass in motion in a straight line. Angular momentum: Rotational inertia in motion.
Define torque.
The rotational equivalent of force; what causes an object to start rotating or change its rotation.
Define rotational inertia.
A measure of how much an object resists changes in its rotational motion.
What is angular acceleration?
The rate of change of angular velocity.
Define Newton's Second Law for Rotation.
The net torque on an object is equal to the product of its rotational inertia and angular acceleration: .
What is tangential speed?
The linear speed of a point on a rotating object, related to angular speed by .
What is tangential acceleration?
The linear acceleration of a point on a rotating object, related to angular acceleration by .