Rotational Kinematics & Dynamics

Front

What is torque?

Back

Torque is a measure of the rotational force applied to an object, calculated as the product of the force and the distance from the axis of rotation (Torque = Force x Distance).

Front

How is torque calculated?

Back

Torque (τ) is calculated using the formula τ = F × r × sin(θ), where F is the force applied, r is the distance from the pivot point, and θ is the angle between the force vector and the lever arm.

Front

What is the unit of torque?

Back

The unit of torque is Newton-meter (Nm).

Front

What is rotational inertia?

Back

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

Front

What is the relationship between torque and rotational acceleration?

Back

Torque is directly proportional to rotational acceleration (α) and is given by the equation τ = I × α, where I is the moment of inertia.

Front

What is frequency in rotational motion?

Back

Frequency is the number of complete revolutions or cycles per second, measured in Hertz (Hz).

Front

What is the period in rotational motion?

Back

The period is the time taken to complete one full revolution, which is the inverse of frequency (T = 1/f).

Front

How does the length of the lever arm affect torque?

Back

A longer lever arm increases torque for the same amount of applied force, making it easier to rotate an object.

Front

What is angular displacement?

Back

Angular displacement is the angle through which an object has rotated about a specific axis, measured in radians.

Front

What is angular acceleration?

Back

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