Revision – Rotational Motion & Gravitation

Grade 11 Physics — Revision – Rotational Motion & Gravitation: 25 practice questions with instant scoring and explanations.

1. Moment of inertia depends on:
2. MOI of uniform solid sphere about diameter:
3. MOI of thin uniform ring about its axis:
4. MOI of solid disc about its axis:
5. Rotational KE = :
6. Torque τ = :
7. Angular momentum L = :
8. Conservation of angular momentum holds when:
9. An ice skater pulls in arms → angular velocity:
10. Work done by torque W = :
11. Power in rotation P = :
12. Rolling without slipping: v_cm = :
13. Universal law of gravitation: F = :
14. Value of G ≈ :
15. Acceleration due to gravity at Earth's surface ≈ :
16. At height h above Earth's surface, g' = :
17. Escape velocity from Earth ≈ :
18. Orbital velocity at Earth's surface ≈ :
19. Kepler's 3rd law: T² ∝ :
20. A geostationary satellite has period:
21. Gravitational PE between two masses: U = :
22. Inside a uniform spherical shell, gravitational field is:
23. At the center of Earth, effective g is:
24. Newton's shell theorem says external gravity of a sphere acts as if mass is at:
25. If radius of planet doubles (mass same), g becomes: