A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in m s⁻¹) through a small hole on the side wall of the cylinder near its bottom, is-
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A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in m s⁻¹) through a small hole on the side wall of the cylinder near its bottom, is-

G1 Physics · Accepted Answer

Step 1: Use continuity A₁v₁ = A₂v₂ and Bernoulli's equation P + ½ρv² + ρgh = constant; for jets use momentum flux ṁΔv. Step 2: Substitute the stated areas, levels and pressures, including Torricelli v = √(2gh) where applicable. Applying these relations to the given data gives B: 20 m s⁻¹. Final answer: B.