Rotational Inertia & 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 her rotational inertia when a figure skater brings in her 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.MS-PS3-1

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 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.

In order to do a lot of flips an Olympic diver would want:

• A high rotational inertia
• A low rotational inertia
• A low linear acceleration
• A low angular velocity

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

A possible unit for angular acceleration is:

• rad/s^2
• rad/s
• N*m
• Kg*m^2