AP Physics 1: Rotation - Newton's Second Law

He's giving an incomplete definition right now, but let's review the complete definition. Rotational Inertia (or "moment of inertia") depends on mass AND...

• How that mass is distributed

• Gravity

• Force

He just increased the net torque. What should this do to the slope of the angular velocity vs. time graph?

• Increase it

• Decrease it

• It should remain the same

From the sensor's "point of view", the turn table started at rest, began to turn CW while speeding up, then started slowing down (when the mass bounced off the floor) while still spinning CW. What would the angular velocity vs. time graph look like?

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• b

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The moment of inertia of a solid disk is . If an object is added on top of it and the object has a mass of m_obj and is placed a distance "d" from the center of the disk, what would be the total moment of inertia of the disk and object?

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How can he decrease the rotational inertia (and therefore increase the angular acceleration) while still having "Edna" "ride" on the disk?

• Move "Edna" closer to the center

• Move "Edna" further from the center

• It isn't possible without using a smaller mass