Drag Force Over a bicycle (Python)

# -*- coding: utf-8 -*-
"""
Created on Mon Oct  1 01:01:30 2018

@author: mayan
"""

# Drag Force Calculation

# Inputs 
import matplotlib.pyplot as plt
import math

def d_f_vs_v(velocity,Area,c_d,rho):
	d_f_v = []
	for v in velocity:
		d_f_v.append(0.5 * c_d * Area * rho * v**2)
	#return d_f_v  
	plt.figure(1)    
	plt.plot(velocity,d_f_v, '-o')
	plt.xlabel('velocity(m/s)')
	plt.ylabel('drag force(N)')
	plt.title('Drag Force vs Velocity')
	plt.show() 

def d_f_vs_c_d(velocity,Area,c_d,rho):
	d_f_cd = []
	for cd in c_d:
		d_f_cd.append(0.5 * cd * Area * rho * velocity**2)
	#eturn d_f_cd  
	plt.figure(2)
	plt.plot(c_d,d_f_cd, '-rd')
	plt.xlabel('drag coefficient')
	plt.ylabel('drag force(N)')
	plt.title('Drag Force vs Drag Coefficient')
	plt.show() 


A = 0.1 # Frontal Area
rho = 1.2 # Density

d_f_vs_v(list(range(25)), A, 0.8, rho)


d_f_vs_c_d(2, A, [x * 0.1 for x in range(0, 25)], rho)

Drag Force vs Velocity:

Drag Force vs Drag Coefficient:

Conclusion:

1. Drag Force is proportional to the square of the velocity.

2. Drag Force is proportional to the drag coefficient.