System of Particles and Rotational Motion – Centre of Mass

Grade 11 Physics — System of Particles and Rotational Motion – Centre of Mass: 25 practice questions with instant scoring and explanations.

1. Centre of mass of a system of particles is:
2. Position of COM for two particles m₁ at x₁ and m₂ at x₂:
3. COM of a uniform rod is at:
4. COM of a uniform circular disc is at:
5. Velocity of COM of a system is:
6. If no external force acts, velocity of COM is:
7. Internal forces affect COM motion:
8. A body explodes in mid-air. COM of fragments:
9. For a system with constant total mass, F_ext = :
10. COM of Earth-Moon system lies:
11. If COM is at origin for two particles m₁ and m₂ at x₁ and x₂, then:
12. Two masses 3 kg and 5 kg are at positions 2 m and 10 m. COM is at:
13. For a uniform triangular lamina, COM is at:
14. COM of a uniform hemispherical shell is at:
15. COM of uniform solid hemisphere from flat face:
16. Momentum of system equals:
17. If a system has F_ext = 0, total momentum is:
18. Two particles of equal mass move in opposite directions with same speed. COM velocity:
19. A boy walks from one end of a boat to the other. COM of boy+boat:
20. The acceleration of COM depends on:
21. COM and centre of gravity coincide when:
22. For a uniform sphere, COM is at:
23. If m₁=2, m₂=3 kg at (0,0) and (5,0), COM x-coordinate:
24. COM of a system of particles depends on:
25. Total linear momentum P equals: