PHYSICS 5A Lecture Notes - Lecture 17: A Deeper Understanding, Angular Velocity, Momentum
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Conservation of angular momentum moment of inertia and its angular velocity. Angular momentum : the quantity of rotation of a body, which is the product of its. Impulse applied to an object results in a change in the object"s momentum. We can use newton"s 3d law on the two objects to show that if only internal forces are involved, then linear momentum is conserved. Meaning that if we apply a torque on an object, it change the object"s angular momentum. Important: the angular momentum of a rotating object is conserved if there is no net (external ) torque. Skater spinning on ice; l = constant so if i decrease, will increases (inverse proportionality relationship) Hurricanes: as air mass travels towards center of hurricane, its moment of inertia decreases and hence (w) increases. Rotation of earth caused by rotation of initial gas cloud.
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