Question

A box of mass 40kg has a base of area 10m2

.Calculate the pressure exerted by it on the

ground (Use 1kg-f=10N).

Answer 1

Answer:

Exact: 39.2 Pa OR 39.2 N/m²

Approximate: 40 Pa or 40 N/m²

Explanation:

Mass = 40 Kg

Area = 10 m²

Weight =  Force = m*g (mass * acceleration by gravity) = 40 * 9.8 (On Earth)

                                                                                           = 392 N

Pressure = Force / Area

               = 392 / 10

               = 39.2 Pa OR 39.2 N/m²

* 'g' can be taken as 10 if it is told to take an approximate value. 9.8 is the exact value.