A cubical box of 1 m side is half filled with water and is placed in an inclined plane making 30° with the horizontal. If it is accelerated along the plane at 2 m/s 2 ( ) upwards, ( ) downwards,...

A cubical box of 1 m side is half filled with water and is placed in an inclined plane making 30° with the horizontal. If it is accelerated along the plane at 2 m/s²
() upwards, () downwards, determine the angle attained by the free surface.

A small bore pipe 3 m long and one end closed is filled with water is inclined at 20° with the vertical and is rotated at 20 rpm with respect to a vertical axis passing through its mid point. The free surface is at the top of the pipe. Determine the pressure at the closed end.