An open rectangular tank, 0.5 m wide and 1 m long, contains water to a depth of 1 m. If the height of the tank is 1.25 m, what is the maximum horizontal acceleration (along a line parallel to the long...

An open rectangular tank, 0.5 m wide and 1 m long, contains water to a depth of 1 m. If the height of the tank is 1.25 m, what is the maximum horizontal acceleration (along a line parallel to the long axis of the tank) that can be sustained before the water spills?