Question

A jeep-like vehicle has a canvas top that seals around all sides. When the jeep is at rest, the canvas roof is flat and level. If all the windows of the jeep are rolled up, and the jeep is traveling along the road at high speed, how does the canvas roof react?

Answer 1

When Jeep is in motion the Canvas top is initially flat

so when Jeep is in motion the air at the top of the Jeep is in high speed

while the air inside the jeep is not moving that fast

so as per Bernuolli's Theorem we know

$P + \frac{1}{2}\rho v^2 = constant$

so if we increase the speed the pressure will decrease

so the canvas will experience less pressure at the top of canvas while at the bottom it will have more pressure from inside

so the Canvas will bulge outside or curved outside