Gravitation — Advanced

Grade 9 Science — Gravitation — Advanced: 25 practice questions with instant scoring and explanations.

1. Buoyancy is the upward force exerted by:
2. Archimedes' principle states that:
3. An object floats when:
4. An object sinks when:
5. An object is neutrally buoyant when:
6. Density is defined as:
7. An object with mass 20 kg and volume 0.025 m³ has density of:
8. Relative density is:
9. Water has a density of approximately:
10. An object with relative density 0.8 will:
11. A cube of wood (density 600 kg/m³) floats on water (density 1000 kg/m³). The fraction submerged is:
12. The buoyant force on a submerged object depends on:
13. A 1 m³ block of iron (density 7800 kg/m³) is fully submerged in water (density 1000 kg/m³). The buoyant force is approximately: (g = 10 m/s²)
14. Apparent weight in a fluid is:
15. When an object is completely submerged, the buoyant force equals:
16. A ship floats because:
17. If the density of an object is 2.5 times the density of water, its relative density is:
18. Pressure underwater increases with:
19. An object of mass 5 kg is fully immersed in water (density 1000 kg/m³). If its density is 2500 kg/m³, the buoyant force is: (g = 10 m/s²)
20. A balloon filled with helium (density less than air) experiences:
21. The density of a liquid can be determined using:
22. An ice cube (density < water) floats on water. The fraction of ice submerged is approximately:
23. When density increases, buoyancy in a given fluid:
24. Archimedes' principle applies to:
25. A solid with density exactly equal to a fluid will: