Gravitation Quiz Total Questions: 20 Marks: 20 Each Question Carries: 1 Mark 1. The force of attraction between any two masses is called: Friction Gravitation Magnetism Pressure 2. Who gave the Universal Law of Gravitation? Newton Einstein Archimedes Galileo 3. The SI unit of acceleration due to gravity is: m/s N m/s² kg 4. The value of g near the surface of Earth is approximately: 9.8 m/s² 4.9 m/s² 1.6 m/s² 98 m/s² 5. Weight of a body is equal to: m/g m × g g/m m + g 6. Mass of an object: Changes from place to place Is always zero on Moon Remains constant Depends on gravity 7. Weight of an object on the Moon is about: Equal to Earth Double of Earth Half of Earth One-sixth of Earth 8. If a body is thrown upward, the value of g is usually taken as: Positive Negative Zero Infinite 9. At the highest point of a body thrown vertically upward, its velocity is: Maximum Minimum Zero Infinite 10. Thrust is a force acting: Parallel to a surface Perpendicular to a surface Upward only Sideways only 11. Pressure is defined as: Force × Area Force / Area Area / Force Mass / Area 12. The SI unit of pressure is: Newton Joule Pascal Watt 13. The upward force exerted by a fluid on an object is called: Frictional force Magnetic force Buoyant force Muscular force 14. An object floats in water when: Its weight is greater than buoyant force Its weight is equal to or less than buoyant force Its mass becomes zero Water disappears 15. Archimedes’ Principle relates buoyant force to: Weight of object Volume of object only Weight of displaced fluid Shape of container 16. Relative density is a ratio of: Mass to weight Density of substance to density of water Weight to area Pressure to thrust 17. Relative density has: Unit of kg Unit of N No unit Unit of m/s² 18. If relative density of a substance is less than 1, it will generally: Sink in water Float on water Break in water Dissolve always 19. The equation v = u + gt is used for: Motion under gravity Pressure only Relative density only Friction only 20. Which of the following sinks in water? Cork Wood Iron nail Oil Submit Quiz Reset