Rotational Inertia and Angular Momentum

Which has greater linear 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

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

Torque is the product of a force exerted on an object times the lever arm.

• True 
• False

The center of mass of an object is always located at the object's geometric center.

• True
• False

Because the sun has several planets orbiting it, it actually wobbles as it moves through space.

• True
• False

Tags

NGSS.HS-PS2-4

NGSS.HS-ESS1-4

When you carry a heavy load with one arm, why do you tend to hold your free arm away from your body?

• To change the mass of your body
• To be ready to grab something in case you fall
• To look good
• To change the center of gravity of your body and the load

Tags

NGSS.MS-ETS1-1

An object will fall over if its center of gravity is 

• outside the object.
• too low.
• not over its area of support
• too high.

Where is the center of gravity of a softball bat located?

• Exactly halfway along the bat
• In the thin handle
• In the more massive end of the bat

Does a bridge anchored resting on two pillars have any torque?

• No, it isn't moving
• Yes, but it is at equilibrium
• Yes, but it will soon break because of the torque
• No, Bridges can't have torque

What force does not cause any torque?

• Force perpendicular to the fulcrum, and not on the fulcrum
• Force horizontal to the fulcrum, and not on the fulcrum
• Force perpendicular to the fulcrum, and slightly off center of the fulcrum
• Forces at a 45 degree angle to the fulcrum, and not on the fulcrum