Explain with the help of Bernoulli's principle that why does a spinning ball follows a curve path during flight ?

Explain with the help of Bernoulli's principle that why does a spinnin

1.	Explain with the help of Bernoulli's principle that why does a spinning ball follows a curve path during flight ?
Answer» Solution :(i) Ball moving withou spin : Streamlines for a fluid around non - spin ball In above fihure , the streamlines around a non - spinning ball moving relative to the fluid. It is clear that the velocity of fluid (air) above and below the ball at corresponding points is the same resulting in zero pressure DIFFERENCE. Air therefore , EXERTS no UPWARD or downwardforce on the ball . Ball moving with spin : As a result there isan upward force resulting in a dynamic LIFT of the wings . In above figure a spinning ball is shown . A spinning ball drags airalong with it. If surface is rough more air drags. The crowding of streamlines ay above the ball indicates high velocity and low pressure , while the sparse streamlines below the ball indicates low velocity and high pressure. Thus difference in velocities of air results in the pressure difference between the lower and UPPER faces and there is a net upward force on the ball . This dynamic lift due to spinning is called Magnus effect.