- #1

#### member 392791

Hello,

I am looking at my lecture notes PDF, and I am having trouble seeing the geometry how A_θ is A_0/cos θ. I can understand how the force acting on that cross section is Pcosθ, just not the part about the area for which F is acting. I think F is normal to the plane, so the cross section area is not just A_0??

I am looking at my lecture notes PDF, and I am having trouble seeing the geometry how A_θ is A_0/cos θ. I can understand how the force acting on that cross section is Pcosθ, just not the part about the area for which F is acting. I think F is normal to the plane, so the cross section area is not just A_0??