A rectangular container of water is pushed down an inclined plane so that it has a constant acceleration of 4 m/s 2 in the direction of the plane. Determine the slope of the free surface using the...

A rectangular container of water is pushed down an inclined plane so that it has a constant acceleration of 4 m/s²
in the direction of the plane. Determine the slope of the free surface using the coordinate system shown in Figure 1.21 so we will know if it will spill.