Chapter 5, Problem 33PP

The drag force on a car is given by

$F_D=\frac{1}{2}\rho v^{2}A{C}_D$

where ρ is the density of air (1.23 kg ∕ m³), v is the velocity in units of m ∕ s, A is the projected area of the car (2.5 m²), and CD is the drag coefficient (0.2). The amount of power in watts required to overcome such drag force is P = F_Dv, and the equivalent horsepower required is Hp = P∕746. Write a program that accepts a car’s velocity and computes the power in watts and in horsepower needed to overcome the resulting drag force. Note: 1 mph = 0.447 m∕s.