A truck with a mass m=5t was moving at a speed V=90 km/h and under the action of a constant braking force will stop after t=20s. Determine: 1) the magnitude of the braking force; 2) run of the car to a complete stop after the start of braking; 3) the work done during the braking of the car.

A detailed solution with a brief note of the condition, formulas and laws used in the solution, the derivation of the calculation formula and the answer.