AP Physics C: Mechanics / Unit 5: Torque and Rotational Dynamics
5.6 Newton's Second Law in Rotational Form
Notes
$$\tau_{net}=I\alpha$$
Practice
$\tau=12$ N·m and $I=4$ kg·m². $\alpha=$
$\displaystyle \frac{12}{4}$.
The same torque on a larger $I$ produces:
Inverse relationship.
Rotational inertia plays the same role as which linear quantity?
$\tau=I\alpha$ like $F=ma$.
A string wrapped around a pulley of radius $R$ is pulled with tension $T$. $\alpha=$
$\tau=TR=I\alpha$.
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