AP Physics C Rotation Questions

Flashcard
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Physics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is rotational inertia (moment of inertia)?
Back
Rotational inertia, or moment of inertia (I), is a measure of an object's resistance to changes in its rotation. It depends on the mass distribution relative to the axis of rotation.
2.
FLASHCARD QUESTION
Front
What happens to angular speed when moment of inertia increases?
Back
When the moment of inertia increases, the angular speed decreases, assuming no external torque is applied. This is due to the conservation of angular momentum.
3.
FLASHCARD QUESTION
Front
Define angular momentum.
Back
Angular momentum (L) is the product of an object's moment of inertia and its angular velocity, given by the formula L = Iω.
4.
FLASHCARD QUESTION
Front
What is the relationship between linear speed and angular speed?
Back
Linear speed (v) is related to angular speed (ω) by the equation v = rω, where r is the radius from the axis of rotation.
5.
FLASHCARD QUESTION
Front
What is the effect of extending arms while spinning on a stool?
Back
Extending arms increases the moment of inertia, which decreases angular speed due to conservation of angular momentum.
6.
FLASHCARD QUESTION
Front
How does mass distribution affect rotational motion?
Back
The distribution of mass affects the moment of inertia; more mass further from the axis increases the moment of inertia, making it harder to change rotational speed.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating the moment of inertia of a solid disk?
Back
The moment of inertia (I) of a solid disk about its center is given by the formula I = \frac{1}{2}MR^2, where M is the mass and R is the radius.
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