A student fills a cardboard carton with water. The student makes a small pinhole in the side of the carton so that the water flows out. At what angle to the side of the carton does the water initially flow out?
Explain why the water flows out of the carton at this angle.
A force of 4.5 N4.5\text{ N}4.5 N acts on a 0.18 m20.18\text{ m}^20.18 m2 area of a desk. Calculate the pressure exerted on the desk.
The force is kept constant and the area the force acts on is doubled. What happens to the pressure exerted on the desk?