ROTATIONAL MOTION

In the expression K = ½ Iω², what does I represent?

• Impulse
• Current
• Inertia
• Moment of inertia

What is the primary purpose of defining moment of inertia in rotational dynamics?

• To measure linear speed
• To calculate gravitational force
• To determine the resistance of a body to angular acceleration
• To find the center of mass

What is the importance of fixed axis in rotational kinetic energy derivation?

• No importance
• Allows translation
• Ensures same ω for all particles
• Reduces mass

What determines the moment arm for the weight about point A?

• Vertical height
• Length of ladder
• Horizontal distance from A to CG
• Angle at B

What is the expression for total kinetic energy in rotation?

• K = ½ Σ mi vi
• K = ω Σ mi ri²
• K = ½ ω² Σ mi ri²
• K = Σ mi ri² ω