Long description
This figure illustrates 4 cases of Coriolis acceleration. Each has a velocity arrow with its tail at a point O labelled u subscript s, an acceleration vector arrow perpendicular to u subscript s, labelled a subscript cor and a curled angular velocity arrow labelled omega. From left to right: U subscript s slopes up to the right, a subscript cor slopes up to the left and omega is anticlockwise; U subscript s slopes up to the right, a subscript cor slopes down to the right and omega is clockwise; U subscript s slopes down to the left, a subscript cor slopes up to the left and omega is clockwise; U subscript s slopes down to the left, a subscript cor slopes down to the right and omega is anticlockwise.