Equations of rotational dynamics (AQA A-Level Physics): Flashcards

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Equations of rotational dynamics
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Newton's second law for rotational motion equation

T=IαT = I\alpha

First rotational equation of motion

ω2=ω1+αt\omega_2 = \omega_1 + \alpha t

Fourth rotational equation (without time)

ω22=ω12+2αθ\omega_2^2 = \omega_1^2 + 2\alpha\theta

Unit of torque (TT)

Newton metres (N m)

Unit of angular acceleration (α\alpha)

Radians per second squared (rad s−2^{-2})

Linear variable equivalent to θ\theta

Displacement, ss

Linear variable equivalent to α\alpha

Acceleration, aa

Conversion: 1 revolution equals how many radians?

2π2\pi radians

Condition required to use rotational equations of motion

Constant (uniform) angular acceleration

What does moment of inertia represent?

Resistance to rotational acceleration

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