Solve the below:
Q: Consider air flowing past a hemisphere resting on a flat surface, as in Fig. If the internal pressure is pi, find an expression for the pressure force on the hemisphere. By analogy at what point A on the hemisphere should a hole be cut so that the pressure force will be zero according to in viscid theory?
![261_Hemisphere.jpg](https://secure.tutorsglobe.com/CMSImages/261_Hemisphere.jpg)