Grade 12Mechanics
What is drag force?
1 Answer
Ramesh V
Drag Force in a Medium
- The force exerted on a body moving in a medium like air or water depends in a complex way upon the velocity of the body relative to the medium, the viscosity and density of the medium, the shape of the body, and the roughness of its surface.
- The most common method of mathematically modeling the drag force is the equation,
| FD | = Drag Force. SI: N |
| CD | = Drag Coefficient. SI: Dimensionless |
| A | = Coss-sectional Area perpendicular to the flow. SI: m2 |
| r | = Density of the medium. SI: kg/m3 |
| v | = Velocity of the body relative to the medium. SI: m/s |
The direction of the drag force is always opposite the direction of the body's velocity.
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regards
Ramesh
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