A rectangular solid block has length 10cm, breadth 5cm and height 2cm. If it lies on a horizontal surface, and has density 100kg/m\(^3\), calculate the pressure it exerts on the surface.
A
20 N/m\(^2\)
B
100 N/m\(^2\)
C
400 N/m\(^2\)
D
300 N/m\(^2\)
Verified Correct Answer: A.
Physical Principles & Numerical Solution
P
=
F
A
=
mg
A
=
(ρ \times v) \times g
A
=
ρ \times (A \times h) \times g
A
P = 100 \times 2 \times 10\(^{-2}\) \times 10 = 20 N/m\(^2\)
Source: Myschool Past Questions Archive (Record #55762)