An see saw in rotational equilibrium (balanced torque) must have the same amount of weight on each side.

• True
• False

A rusty bolt is hard to get turned.  What could be done to help get the bolt turned?

• increase the lever arm
• decrease the force
• apply the force at a 30 degree angle

Tags

NGSS.MS-PS2-2

Describes an object's resistance to changes in rotation

• mass
• lever arm
• rotational inertia
• torque

The rotational version of force

• alpha
• moment of inertia
• lever arm
• torque

The rotational version of mass is

• alpha
• moment of inertia
• lever arm
• torque

"a" is to translation as ____ is to rotation 

• α
• ω
• θ
• τ

"v" is to translation as ____ is to rotation 

• α
• ω
• θ
• τ

"x" is to translation as ____ is to rotation 

• α
• ω
• θ
• τ

This variable tells us how fast an object rotates

• ω
• θ
• Δx
• v

Which variable tells us rotational displacement?

• Δx
• ∆θ
• α
• ∆ω