Lecturer
Dynamic Characteristics of the Vehicle
Inertia resistance (Fi):
the force required by a vehicle to overcome the tendency to remain at rest or remain in motion in
straight line with a constant speed
Fi = m × a ,
m : vehicles mass (Kg) , a = vehicles acceleration (m/sec2)
* (Fi) be (+) positive where there is acceleration ( + a)
*(Fi) be (-) negativewhere there is deceleration (- a)
Air resistance (Fa):
the force required by a vehicle to move air from a vehicles
pathway as well as to overcome the frictional effectsof air with vehicle side top and under.
𝐹𝑎 = 0.5 ∗ 𝐶𝑑 ∗ 𝜌 ∗ 𝐴 ∗ 𝑉2
Where Cd is aerodynamic drag resistance, Cd = P.C typical value = o.4,
ρ = air density (kg/m3) = 0.0382 kg/m3 , A = Frontal cross-section area (m2)
Material File