11. Momentum & Impulse
Intro to Conservation of Momentum
Multiple Choice
Multiple ChoiceAn ice skater is spinning with outstretched arms. As he pulls his arms in toward his body, what happens to the rate at which he is spinning, and why?
A
He spins slower because some of his speed was used to pull his hands in.
B
His speed does not change because nothing collided with him.
C
His speed does not change because his moment of inertia did not change.
D
He spins faster because his mass decreased.
E
He spins faster because his moment of inertia increased.
F
He spins faster because his moment of inertia decreased.
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