A rectangular solid black has length 10cm bread... - JAMB Physics 2019 Question
A rectangular solid black 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
200 N/m\(^2\)
B
A.
300 N/m\(^2\)
C
B.
100 N/m\(^2\)
D
C.
400 N/m\(^2\)
correct option: a
| P | = | F
A |
= | mg
A |
= | (ρ × v) × g
A |
= | ρ × (A × h) × g
A |
P = 100 × 2 × 10\(^{-2}\) × 10 = 200 N/m\(^2\)
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