What is the braking distance at 80 km/h?
1 Answers
Under normal braking conditions, it takes at least 25-27 meters for the car to come to a complete stop. 1. Braking distance: The braking performance of a vehicle primarily depends on the friction between the tires and the road surface. The magnitude of this friction is determined by the coefficient of friction (μ). The braking distance (S) can be calculated using the formula S=V²/2gμ, where V is the speed, and g is the acceleration due to gravity. This shows that the braking distance is directly proportional to the square of the speed and inversely proportional to the coefficient of friction. When the coefficient of friction is constant, the braking distance depends on the vehicle's speed. If the speed doubles, the braking distance increases by a factor of four. 2. Speed and braking distance: The coefficient of friction (μ) is influenced by various factors and typically averages around 0.8. It can drop below 0.2 on rainy days and even lower on icy or snowy roads. Assuming a coefficient of friction (μ) of 0.8, the braking distance varies with different speeds.