Buoyancy & Buoyant Force Video Lessons

Concept

# 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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