ROTATIONAL MOTION

What is the effect of increasing the angular speed of the bicycle rim before releasing one string?

• The rim falls faster
• Precession speeds up
• Rotation reverses
• Precession becomes slower

What is the outcome when the net external torque on a system is zero?

• Rotation stops immediately
• Kinetic energy vanishes
• Angular velocity becomes infinite
• Total angular momentum remains constant

How does the position vector affect angular momentum in multi-particle systems?

• All particles share the same position vector
• Position vector has no effect in systems
• It is replaced by center of mass
• Each particle’s angular momentum depends on its own position vector relative to the origin

What is the significance of vector addition in calculating total angular momentum?

• It simplifies calculations
• It converts vectors into scalars
• It eliminates negative values
• Angular momentum is a vector quantity and must account for direction

In the expression τ = dl/dt, what does 'l' represent?

• Linear displacement
• Rotational kinetic energy
• Moment of inertia
• Angular momentum of the particle