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)
Correct Answer: Option A
Explanation
| P | = | F A |
= | mg
A |
= | (ρ × v) × g
A |
= | ρ × (A × h) × g A |
P = 100 × 2 × 10(^{-2}) × 10 = 20 N/m(^2)
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