ROTATIONAL MOTION

Why does a spinning top precess when tilted?

• Because it loses energy
• Because friction stops it
• Because gravity applies a torque that changes the direction of angular momentum
• Because mass decreases

What is the condition for a body to have stable rotation about an axis?

• Any axis is stable
• Only vertical axis is stable
• The axis must be a principal axis of inertia
• Stability depends on color

How does the angular momentum of two identical particles moving in opposite directions on a ring compare?

• They cancel completely
• They double linear momentum
• Their axial components add, but transverse components cancel if symmetric
• They create heat

Why is the term 'fixed axis' important in the context of rotational angular momentum?

• It reduces mass
• It increases speed
• It allows simplification by defining a constant direction for axial quantities
• It changes color

What is the main advantage of using vector notation in angular momentum analysis?

• It simplifies mass calculation
• It reduces number of variables
• It allows proper handling of direction and superposition
• It eliminates time