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Understanding Buoyant Force and Floating Objects

Learn about buoyant force and whether objects float or sink in fluids based on their weight and displacement. Explore scenarios to determine the buoyant force on objects and their chances of floating. Discover why objects with higher displacement may have a better chance of floating.

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Understanding Buoyant Force and Floating Objects

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  1. What is the buoyant force from the fluid on the object? • Weight of object in air = 32.0 N • Weight of object in fluid = 10.0 N • Will the object float or sink?

  2. What is the weight of the object in air? • Buoyant force = 17. N • Weight of object in fluid = 0 N • Will the object float or sink?

  3. What is the buoyant force on the object? • Mass of displaced water = 408. g • Weight of object in air = 5.2 N • Will the object float or sink?

  4. What is the weight of the object in the fluid? • Buoyant force of the fluid on the object = 25. N • Mass of object = 4.5 kg • Will the object float or sink?

  5. When placed in water which will displace more fluid? Object 1 Object 2 • Buoyant force = 12. N • Buoyant force = 20. N When placed in water will the objects float or sink? • Mass of object = • 3.51 kg • Mass of object = • 1.22 kg

  6. 50g 50g • Which has a better chance of floating? Why?

  7. Answers • Slide 1: 22.0 N; sink • Slide 2: 17. N; float • Slide 3: 4.00 N; sink • Slide 4: 19. N; sink • Slide 5: object 2; object 1 will float; object 2 will sink • Slide 6: larger object because it will displace more water which means it will have a bigger bouyant force

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