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Rotational Dynamics

In this module, we will examine Torque and Moment of Inertia (the rotational analogs of force and mass) and Newton's Second Law for Rotation. Torque and Rotational Inertia are more complicated than their linear brethren in that their values depend upon the axis of rotation about which they are computed. The torque applied to an object by a force depends not only upon the force, but the point of application through the math of vector cross products. The moment of inertia of an object is different for different axis of rotation even though the object's mass is the same. Furthermore an object can change it's moment of inertia by changing how its mass is distributed (like when a skater spreads out their arms) without changing their mass.

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