Answer: The spin speed decreases.
- A The spin speed decreases
- B The spin speed increases
- C The tilt angle decreases
- D The mass decreases
Correct answer: A. The spin speed decreases
Explanation: Precession rate Ω = Mgr/(Iω). Decreasing spin speed ω (denominator) increases Ω.
Torque about axis O equals the force F multiplied by the perpendicular distance r⊥ from the axis to the line of action of the force, producing rotation.
Concept context
Moment of inertia, torque, angular momentum, rolling motion. Very high JEE weightage.
Read the full System of Particles and Rotational Motion notes →