All Flashcards
What is the effect of a non-zero net torque?
It causes angular acceleration, changing the object's angular velocity.
What happens when the net torque on an object is zero?
The object maintains a constant angular velocity (rotational equilibrium).
What is the effect of increasing the distance from the axis of rotation when applying a force?
It increases the magnitude of the torque, assuming the force remains constant.
What is the effect of increasing the moment of inertia given constant net torque?
It decreases the angular acceleration.
What happens when a force is applied at the center of mass?
There is no torque generated, and the object will only undergo translational motion.
What is the effect of a net torque on an object?
A net torque causes angular acceleration, changing the object's angular velocity.
What is the effect of increasing the distance from the pivot point when applying a force?
Increasing the distance (r) increases the torque (τ = rFsinθ), assuming force and angle remain constant.
What happens when a spinning figure skater pulls their arms inward?
Their moment of inertia decreases, causing their angular velocity to increase to conserve angular momentum.
What is the effect of applying a force perpendicular to a rod at its end?
It creates a torque that causes the rod to rotate around the pivot point, resulting in angular acceleration.
What happens when the sum of all torques acting on a system is zero?
The system is in rotational equilibrium, meaning its angular velocity remains constant.
What happens in the absence of external torques?
Angular momentum is conserved.
What is Rotational Equilibrium?
The state where an object maintains a constant angular velocity due to zero net torque.
What is Torque?
The rotational equivalent of force, calculated as , causing an object to rotate.
What is Angular Velocity?
The rate at which an object rotates or revolves relative to another point, i.e. how many radians per second the object turns.
What is Angular Acceleration?
The rate of change of angular velocity, resulting from a net torque.
Define Moment of Inertia.
A measure of an object's resistance to changes in its rotation rate. Represented by 'I' in rotational dynamics.
What is Newton's First Law for Rotation?
An object maintains a constant angular velocity unless acted upon by a net torque.