Physics Form 4: Chapter 3 - Application of Bernoulli principle (WindSurfing)

 

• The air flow over the sail causes an increase in pressure on the windward side and a decrease on the leeward side
• Area of leeward side has a low pressure because of the high speed of the wind.
• A resultant force acts in the direction of F.
• This resultant force can be resolved into component to the right and left.
• The component to the right can be balanced by the surfer who pulls it to the left.
• Therefore, there exists a resultant force to the front so that the surfer moves to the front.
• Factors affect the resultant force is the strength of the wind and the shape of the sail.