Question

If 5 bricks each of mass 15kg are kept one over the other, find the pressure experienced by the 2nd brick from ground level.( Dimension of brick 75 x 50 x 10 in cm units)

Answer 1

Answer:

pressure experience by 2nd brick is 1200 N/m²

Explanation:

5 bricks each of mass 15kg are kept one over the other

we need to find pressure experienced by the 2nd brick from ground level

its mean force on  2nd brick is = weight of three brick upon it

force on 2nd brick = 3×weight of brick × g

= 3×15×10    we take g=10 m/s² gravitational acceleration

F = 450 N

we know pressure = force / area

the surface area of brick = 75×50 cm²

A= 3750 cm² = 3750×10⁻⁴   m²

so

pressure = F/A

P = 450/3750×10⁻⁴

P = 0.12 × 10⁴

pressure P = 1200 N/m²