Explain how lift is generated by differential pressure using Bernoulli's equation for a general body and for an airfoil. Using this understanding solve the following: A flat metal plate bearing a mosaic has been hung from the ceiling of a new outdoor art gallery. The plate has an area of 2.5 m and is suspended by elastic ties, with guide rods to prevent lateral motion. When the wind blows through the gallery the bottom of the plate sees a velocity flow while the top of the plate has quiescent air. If the plate moved down 2 cm and the elastic ties can be thought to have a N spring coefficient of 20, what must the velocity of the air below the plate be? m V K= 200 N m A=2.5m