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Grade: 12


What is drag force?

What is drag force?

11 years ago

Answers : (1)

Ramesh V
70 Points

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.





11 years ago
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