# Physics

A ball of Styrofoam (ρ = 100 kg/m3) is totally submerged in water. The ball has a mass of 300.0 g

What is the volume of the ball?

If a string holds the ball when it’s in the water, what’s the tension in the string?

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1. Okay, I figured out the volume, I just need help finding the tension. What should I do to find that?

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posted by Sandy
2. Vs = 0.3kg * 1m^3/100kg = 0.003 m^3 =
Vol. of Styrofoam = Vol. of water Dis-
placed.

Mass = 0.003m^3 * 100kg/m^3 = 0.3 kg.
T = 0.3kg * 9.8N/kg = 2.94 N.

Note: Density of water = 1000kg/m^3.

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posted by Henry

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