Mechanics
Newton's Second Law (Rotation)
Rotational analog of Newton's second law.
Variables
τN·m
Net torque
Sum of torques
Ikg·m²
Moment of inertia
Rotational inertia
αrad/s²
Angular acceleration
Rotational acceleration
Derivation
Rotational equivalent: τ = Iα (compare F = ma).
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Common questions
What is the Newton's Second Law (Rotation) formula?
Newton's Second Law (Rotation) is written τ= Iα. Rotational analog of Newton's second law. It belongs to Mechanics, under Rotational Motion.
What are the units in τ= Iα?
In SI units, τ is net torque, measured in kg·m²/s²; I is moment of inertia, measured in kg·m²; α is angular acceleration, measured in rad/s².
How is the Newton's Second Law (Rotation) formula derived?
Rotational equivalent: τ = Iα (compare F = ma). The result is τ= Iα.