A lorry of mass 2000kg at 36km/h is brought to rest over a distance of 20m. Calculate the average breaking force.

get acceleration via

v^2 = 2as
and then, of course, F = ma = mv^2/2s
watch the units

Did you know?

Did you know that the average braking force can be calculated by dividing the change in momentum of an object by the distance over which it is brought to rest? For example, if a lorry with a mass of 2000kg is traveling at a speed of 36km/h and is brought to rest over a distance of 20m, the average braking force can be determined. By converting the speed to meters per second (36km/h = 10m/s) and using the formula force = mass x acceleration, the change in momentum can be found. Dividing the change in momentum by the distance, we can calculate the average braking force. This calculation helps understand the importance of braking systems in vehicles and how forces impact the process of bringing a moving object to rest efficiently and safely.