ROTATIONAL MOTION

Why is the vector OC × v perpendicular to the fixed axis of rotation?

• Because OC is zero
• Because v is parallel to the axis
• Because it opposes gravity
• Because OC lies in a radial plane and v is tangential, making their cross product axial

In the expression l = r × p, what does the symbol 'p' represent?

• Position vector
• Angular velocity
• Linear momentum of the particle
• Rotational energy

What is the primary reason for separating angular momentum into L_⊥ and L_z components in rotational motion?

• To calculate linear speed
• To distinguish between axial and transverse contributions to total angular momentum
• To determine gravitational effects
• To measure temperature changes

How is the velocity vector oriented relative to CP in circular motion?

• Parallel to CP
• At 45° to CP
• Perpendicular to CP
• Opposite to CP

What is the consequence of choosing a non-symmetric axis for rotation?

• No consequence
• L becomes zero
• L does not lie along the axis
• Kinetic energy decreases