object’s rotational inertia multiplied by its angular acceleration.• To solve problems involving a massive pulley, make sure you draw a free-body diagram of the pulley.
Also, when a rope passes over a massive pulley, the tension in the rope on one side of the pulley won’t
be the same as the tension on the other side.
• The total kinetic energy of a rolling object is equal to the sum of its linear kinetic energy and its
rotational kinetic energy.
• Angular momentum in a closed system is conserved. An object doesn’t necessarily need to travel in a
circle to have angular momentum.