Question

A brick is 30 cm long, 10 cm wide and 10cm thick.It weights 24 N and is lying on the ground.Find the pressure exerted by the brick on the ground

Answer 1

If the brick is kept by it's length.
Then ,
the base area = 30cm = 0.3m
and force = 24N

Hence, the pressure = 24/0.3 = 80pa.
(as pressure = force/ area)

Similarly,
When it's kept by it's width
then, pressure = 24 / 0.1 = 240pa
and this would the same pressure when it's kept by it's thickness as both are same.

Answer 2

Answer:

Converting the units from cm to m, we have the dimensions as-

0.32 m

0.1 m

0.1 m

Area in contact with ground = 0.32 x 0.1 = 0.032 m²

We know that, Pressure = Force/Area

                                         24/0.032     =   750 N/m²  = 500Pa

Explanation: