ROTATIONAL MOTION

What is the unit of moment of inertia?

• kg/m²
• kg·m
• kg·m²
• kg²·m

Why is ω taken out of the summation when calculating total kinetic energy?

• Because ω is zero
• Because ω is small
• Because ω is the same for all particles in rigid body rotation
• Because ω is vector

What is the significance of the axis in calculating moment of inertia?

• It has no effect
• It only affects direction
• It determines the perpendicular distance of each mass element
• It changes the mass

In the kinetic energy expression K = ½ Iω², what is analogous to mass in linear motion?

• ω
• v
• I
• τ

What determines the moment of inertia of a rigid body?

• Only total mass
• Only shape
• Mass distribution and axis of rotation
• Only angular velocity