Question

With what force does the Earth's atmosphere act on one side of a wall whose height is 4m and its length is 10m? When calculating take the value of normal atmospheric pressure. (answer-4.05 MN)

Answer 1

$$P=\dfrac{F}{A},$$ $$F=PA=101325\ Pa\cdot4\ m\cdot10\ m=4.05\cdot10^6\ N=4.05\ MN.$$