By the end of this chapter you should be able to
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 | define angular momentum and calculate its value for a rotating object;
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 | describe rotational inertia and calculate the moment of inertia for objects with simple shapes;
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 | explain why objects can change their rotational velocities by applying the conservation of angular momentum;
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 | define center of mass and apply it to practical situations;
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 | define and calculate rotational energy; and
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 | explain why rolling objects of different shapes are accelerated differently.
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