Buoyancy & Buoyant Force Video Lessons

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Problem: Three balls with the same radius 11 cm are in water. Ball 1 floats, with half of it exposed above the water level. Ball 2, with a density 815 kg/m3 is held below the surface by a cord anchored to the bottom of the container, so that it is fully submerged. Ball 3, of density 1342 kg/m3 is suspended from a  rope so that it is fully submerged. Assume the density of water is 1000 kg/m3 in this problem.What is the tension on the rope holding the 2nd ball in Newtons?

FREE Expert Solution

The buoyant force is directed upward.

The weight is directed downward.

The tension in the rope pulls the ball downward.

ΣF = ma

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Problem Details

Three balls with the same radius 11 cm are in water. Ball 1 floats, with half of it exposed above the water level. Ball 2, with a density 815 kg/m3 is held below the surface by a cord anchored to the bottom of the container, so that it is fully submerged. Ball 3, of density 1342 kg/m3 is suspended from a  rope so that it is fully submerged. Assume the density of water is 1000 kg/m3 in this problem.

What is the tension on the rope holding the 2nd ball in Newtons?

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