Question 14
PressureA rectangular tank contains water to a depth of 2 m. If the base is 4 m × 3 m, calculate the force on the base (Density of water = 103 kg m−3, g = 10 m s−2)
- A.2.4 × 105 N
- B.2.4 × 104 N
- C.2.0 × 104 N
- D.1.7 × 103 N
Show the answer and explanation
Answer: A (2.4 × 105 N)
Explanation
Pressure = hρg = 2 × 1000 × 10 = 2 × 104 Pa. Force = pressure × area = 2 × 104 × 12 = 2.4 × 105 N.