Angular Momentum

What is the symbol for angular momentum?

• I

• L

• ρ

• E_k

What is the unit for angular momentum?

• kg

• radians per second

• kg m²

• Kg m² s^-1

A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,

• her moment of inertia increases and her angular speed decreases.
• her moment of inertia decreases and her angular speed increases.
• her moment of inertia increases and her angular speed increases.
• her moment of inertia increases and her angular speed remains the same.

Which of these gives rotational kinetic energy?

• a
• b

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 is happening to the ice skater?

• Decreased Angular velocity, decreased rotational inertia

• Decreased Angular velocity, increased rotational inertia

• Increased Angular velocity, increased rotational inertia

• Increased Angular velocity, decreased rotational inertia

What does Rotational Inertia depend on?

• Mass

• Mass Distribution

• Both Mass and its Distribution

• Neither Mass nor its distribution

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

Which would have a greater angular velocity?

• Kid near the center of the merry go round

• Kid near the outside of the merry go round

• neither