AP Torque and Angular Momentum Flashcard Study

Front

What is angular acceleration?

Back

Angular acceleration is the rate of change of angular velocity over time, typically measured in radians per second squared (rad/s²).

Front

What is the relationship between linear speed and angular speed?

Back

Linear speed (v) is related to angular speed (ω) by the formula v = rω, where r is the radius of the circular path.

Front

What is the unit of angular speed?

Back

The unit of angular speed is radians per second (rad/s), but it can also be expressed in revolutions per minute (rpm).

Front

What is the moment of inertia?

Back

The moment of inertia is a measure of an object's resistance to changes in its rotation, depending on the mass distribution relative to the axis of rotation.

Front

How does the moment of inertia affect rotational motion?

Back

A larger moment of inertia means that more torque is required to achieve the same angular acceleration.

Front

What is the principle of conservation of angular momentum?

Back

The principle states that if no external torque acts on a system, the total angular momentum of the system remains constant.

Front

What is the formula for kinetic energy of a rotating object?

Back

The kinetic energy (KE) of a rotating object is given by KE = 1/2 I ω², where I is the moment of inertia and ω is the angular speed.

Front

What is the difference between rolling without slipping and sliding?

Back

Rolling without slipping means that the point of contact between the rolling object and the surface is at rest, while sliding occurs when there is relative motion at the contact point.

Front

What factors determine the rotational speed of an object on a merry-go-round?

Back

The rotational speed is determined by the radius from the center of rotation and the angular speed, which is the same for all points on the object.

Front

What is the relationship between torque and angular acceleration?

Back

Torque (τ) is related to angular acceleration (α) by the equation τ = Iα, where I is the moment of inertia.