All Flashcards
What is angular displacement ()?
How much an object has rotated, measured in radians.
What is angular velocity ()?
The rate of change of angular displacement, measured in rad/s.
What is angular acceleration ()?
The rate of change of angular velocity, measured in rad/s².
What is torque ()?
A twisting force that causes rotation; the rotational equivalent of force, measured in N·m or J.
What is moment of inertia (I)?
Resistance to rotational motion, measured in kg·m².
What is rotational kinetic energy (Krot)?
Energy of rotation, measured in Joules (J).
What is angular momentum (L)?
Measure of rotational motion, measured in kg·m²/s.
What is the effect of applying a torque to an object?
It causes the object to experience angular acceleration.
What happens to angular velocity when moment of inertia decreases in a closed system?
Angular velocity increases to conserve angular momentum.
What causes a change in angular momentum?
An external torque applied over a period of time.
What is the effect of increasing the lever arm when applying a force?
It increases the torque produced.
What happens when a figure skater pulls their arms in?
Their moment of inertia decreases, and their angular velocity increases.
What happens when net torque is zero?
Angular momentum is conserved.
What is the relationship between angular and linear displacement?
Angular displacement: | Linear displacement: . , where s is arc length and r is the radius.
What is the relationship between angular and linear velocity?
Angular velocity: | Linear velocity: v. , where v is linear velocity.
What is the relationship between angular and linear acceleration?
Angular acceleration: | Linear acceleration: a. , where a is linear acceleration.
How is torque similar to force?
Torque: Causes rotational acceleration. | Force: Causes linear acceleration.
How is moment of inertia similar to mass?
Moment of Inertia: Resistance to rotational motion. | Mass: Resistance to linear motion.