You have a rectangle box filled with a liquid to height H. How will the force on the sidewall of the box change if the height (H) is increased without adding anymore fluid? (i.e. a smaller solid box is added to displace the liquid). Assuming the equation F=specific weight*depth of center point*Area of the sidewall, holds true then the force would increase based on the height increase. I have a hard time understanding this because the weight of the water in not increased. How would this same situation affect the force on the bottom of the box? Thanks for the input!