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# Drag Force on a Football

MichaelBartmess.Drag Force on a Football

This equation computes the drag force on a football.

The equation for drag force is `F_d = 1/2 * rho * A *C_d * v^2`

We use the vCalc equation, Force of Drag, where we have set the air density, `rho`, to be a default air density of 1.2754 `(kg)/m^3`.

We use the drag coefficient for a cone (see again the Force of Drag vCalc equation) of 0.50.

The cross sectional area of a football, `A`, is defined by the vCalc constant, Maximum Football axis_1 or axis _2 - NCAA, (which we call `R`) and we use `R` as the radius of the cross sectional area. So, the area is defined as `A = pi * R^2`.

From the paper by Horn and Fearn, we estimate the default velocity of a well-thrown football to be `20 m/s`

# See also

- Ohio State vs Michigan Scores
- Football Calculator
- Aerodynamic Torque on a Football
- Deflection Due to Magnus Force
- Drag Force on a Football
- College Football Consensus National Champions Data
- Most College Championships
- Number of College Football Championships
- Goal Post Cross-bar Height (American Football)
- Length of Football Field
- Sport Ball Sizes
- Minimum Football Circumference - NCAA
- Minimum Football Length - NCAA
- Maximum Football Circumference - NCAA
- Maximum Football Length - NCAA
- Minimum Football axis_1 or axis_2 - NCAA
- Maximum Football axis_1 or axis_2 - NCAA

**Drag Force on a Football**, references 3 equations/constants.

**Equations and Constants **

**Drag Force on a Football**, is used in 1 calculator and 1 equation/constant.

**Calculators**

**Equations and Constants **

**Drag Force on a Football**, is listed in 1 Collection.