Practice Buoyancy (11.4) - Buoyancy, Metacentre, Stability and Rigid Body Motion

Practice: Buoyancy

Lesson 11.4Buoyancy, Metacentre, Stability and Rigid Body Motion

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10 questions

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4 cards from this section. Quick, good the night before a test.
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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is buoyancy?
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Think about floating objects.
Question 2.
What did Archimedes discover?
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It involves what happens when objects are placed in water.
3Question 3.
What does Archimedes' principle state?
- The buoyant force is less than the weight of the object
- The buoyant force is equal to the weight of the fluid displaced
- The buoyant force is always equal to zero
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Recall what happens to objects submerged in fluids.
4Question 4.
True or False: The center of buoyancy can change when a submerged object is tilted.
- True
- False
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Think about how the shape of an object submerged in water can shift.
Question 5.
A ship has a center of gravity located 3 meters above the waterline, and the metacenter is 5 meters above the waterline. Will the ship be stable or unstable?
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Evaluate the stability based on the vertical relationships.
Question 6.
A spherical object has a diameter of 0.5 m and is submerged in water (density = 1000 kg/m³). Calculate the buoyant force acting on the object.
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Use the formula for the volume of a sphere and apply the force of gravity on the displaced fluid.

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