Question
Download Solution PDFWhat will be the drag force exerted on a flat plate of size 2 m x 2 m, when the plate is moving at a speed of 4 m/s normal to its plane in water? [Consider, Coefficient of drag = 1.2]
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Drag force on a body moving in fluid is given by:
\( F_D = \frac{1}{2} C_D \rho A V^2 \)
Given:
- Coefficient of drag, \( C_D = 1.2 \)
- Density of water, \( \rho = 1000~\text{kg/m}^3 \)
- Plate area, \( A = 2 \times 2 = 4~\text{m}^2 \)
- Velocity, \( V = 4~\text{m/s} \)
Calculation:
\( F_D = \frac{1}{2} \times 1.2 \times 1000 \times 4 \times 16 = 38400~\text{N} = {38.4~\text{kN}} \)
Last updated on Jul 15, 2025
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