Moderate

An application of Bernoulli's equation for fluid flow is found in

Correct answer: A. Dynamic lift of an aeroplane

  • A. Dynamic lift of an aeroplane
  • B. Viscosity meter
  • C. Capillary rise
  • D. Hydraulic press

Explanation

The correct answer is Dynamic lift of an aeroplane. Bernoulli's equation describes the conservation of energy in fluid flow, where an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or potential energy of the fluid. This principle is applied in the design of aircraft wings to generate lift. Faster flow over the top of the wing creates lower pressure compared to the slower flow beneath, resulting in lift.Option B, Viscosity meter, is incorrect because it measures the fluid's internal friction, unrelated to Bernoulli's principle. Option C, Capillary rise, is incorrect as it is governed by surface tension and not Bernoulli's equation. Option D, Hydraulic press, relies on Pascal's principle, which is about pressure transmission in fluids, not Bernoulli's principle.

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About Fluid Dynamics

Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.

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