Question #c9625
1 Answer
618lbforce
Explanation:
The size of the pool is unimportant, as long as it can hold the cube. Only the depth matters, because this determines the pressure (=force per unit area).
It's a pity this problem was stated in old english measures.
I'll convert to metrical units, and convert the answer back.
The pressure goes up by
(
Top of the cube
Is at
this gives a pressure of
Multiply by area:
The sides
Since pressure rises linearly with depth, we may use the average pressure which will occur halfway up the cube.
Depth halfway is
Pressure will be
Multiply by area:
Answer
Conversion:
