Torque and Angular Momentum

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

What happens to his rotational inertia, also called the moment of inertia, when a figure skater brings in his arms?

• Increase her rotational inertia

• Decrease her rotational inertia

• has no affect

Why are you more stable when riding a bicycle at a faster speed?

• You have more mass
• The wheels have angular momentum
• It's not easier to ride at a faster speed
• The bike has more momentum

Tags

NGSS.HS-PS2-2

What happens to her angular velocity when a figure skater brings in her arms?

• Increases her angular velocity
• Decreases her angular velocity
• Has no affect

What does the rotational inertia/moment of inertia describe?

• The average position of mass in an extended object.

• How the mass of an object is distributed

• How a force can rotate an object.

• The tendency of an object to move in a straight line.

A disc rotates through 20 rotations in 5 seconds. If the disc starts from rest, what is the angular velocity?

• 5 rotations/s
• 100 rotations/s
• 4 rotations/s
• 10 rotations/s

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

How many radians make up one revolution of 360 degrees?

• π/2

• π

• 2π

• 3π/2

What does Rotational Inertia depend on?

• Mass

• Mass Distribution

• Both Mass and its Distribution

• Neither Mass nor its distribution

Which of these items is easier to turn?

• Left

• Right

• Both are just as easy to turn