Example - 05 A hut has a roof made up of flat metallic sheet weighing
with length and breadth as shown in the Fig. What is the maximum uniform wind up to which the roof can remain intact. Assume tha the roof is just kept on the top of the walls.
Solution :- speed of wind at the top surface of the roof. speed of wind at the bottom surface
According to Bernoulli's theorem The force exerted by the wind on the roof,
with 
length and 
breadth as shown in the Fig. What is the maximum uniform wind up to which the roof can remain intact. Assume tha the roof is just kept on the top of the walls. 
speed of wind at the top surface of the roof. 
speed of wind at the bottom surface 
