A small rock sits at the bottom of a cup filled with water. The upward force exerted by the water on the rock is $ F_0 $. The water is then poured out and replaced by an oil that is $ \frac{3}{4} $ as dense as water, and the rock again sits at the bottom of the cup, completely under the oil. Which of the following expressions correctly represents the magnitude of the upward force exerted by the oil on the rock?

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A small rock sits at the bottom of a cup filled with water. The upward force exerted by the water on the rock is $ F_0 $. The water is then poured out and replaced by an oil that is $ \frac{3}{4} $ as dense as water, and the rock again sits at the bottom of the cup, completely under the oil. Which of the following expressions correctly represents the magnitude of the upward force exerted by the oil on the rock?(a) $$ \frac{3}{4} F_0 $$
, (b) $$ F_0 $$
, (c) $$ \frac{4}{3} F_0 $$
, (d) The answer cannot be determined without knowing the rock’s volume.
:

Jason · Accepted Answer

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