Quoted By:
>1. On the wall of a ship 20cm beneath the water's surface, there is a hole which has a diameter of 5cm^2. How much force do we have to apply on the hole to stop water flowing into the ship? The density of the water is 1030kg/m^3.
>2. How much force do we have to apply to one surface of a hidraulic elevator so that we could raise an automobile (which weighs 1t) on the other side? The surface of the bigger piston is 1m^2 and the smaller one is 1dm^2.
