Spinning Cricket Ball:

Consider a cricket ball which has translational as well as rotational motions. Refer to Figure which shows a cricket ball B spinning in the clockwise direction about an axis perpendicular to this paper and moving along a line from left to right. Now let the air is rushing within the opposite direction (right to left). Due to the rotational motion, the air below the ball gets speeded up and that above it is slowed down. As per to the Bernoulli's equation, the increase in kinetic energy of air (fluid) below the ball is compensated by decrease in the pressure energy. As a result, low pressure area is created in the region below the ball. The ball, thus, gets deflected downwards.

Figure: A Cricket Ball with Rotational and Translational Motion