I can compute the work done by a variable force. I can. compute the total force on a plane surface due to hydrostatic pressure. Be sure to read the notes at the end of the problem statement before starting on this Learning Target. 1. A large tank has a plastic window in one wall that is designed to withstand a force of 90 000 N. The at, square window is 2 m on a side, and its lower edge is 1 m from the bottom of the tank. (a) If the tank is lled to a depth of 4m, what is the total force due to pressure on the window? Can the window withstand this force? (b) What- is the maximum depth to which the tank can be lled without. the window failing? Notes: Assume the density of water is 1000 kg/m3 Omitting units will result in unacceptable work. Omitting a diagram with a clear indication of your choice of coordinate system will result in unacceptable work