Angular Momentum Review

When a rigid object rotates about a fixed axis, what is true about all the points in the object? 

• They all have the same tangential acceleration.
• They all have the same angular speed.
• They all have the same tangential speed.
• They all have the same radial acceleration.

Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• The inside horse
• The outside horse
• Neither - they both have the same angular speed

Which would have a greater linear velocity?

• Kid near the center of the merry go round
• Kid near the outside of the merry go round
• neither

The moment of inertia:

• is synonymous with mass
• does not depend on where the mass is located
• resistance to a change in rotational inertia
• more resistance to change = less inertia

Which of these items is easier to turn?

• Left

• Right

• Both are just as easy to turn

What does this formula measure?

• moment of inertia
• impulse
• electric current
• angular momentum

According to the Law of Conservation of Angular Momentum, if I (momentum of inertia) increases, what will happen to ω?

• Decrease
• Stay the same
• Increase

What are the units for angular momentum?

• kg⋅m/s

• kg⋅m²/s

• kg⋅m/s²

• kg⋅m²⋅s

A ring, a disk, and a solid sphere begin rolling down a hill together. Which reaches the bottom first?

• disk

• ring

• sphere

• all reach the bottom at the same time

Tags

NGSS.HS-PS2-4

An industrial flywheel has a greater rotational inertia when most of its mass is

• nearer the axis

• uniformly spread out as in a disk

• nearer the rim