A car weighing 1.5 tons begins to move with an acceleration of 2 m / s ^ 2. to determine

A car weighing 1.5 tons begins to move with an acceleration of 2 m / s ^ 2. to determine the force of resistance to movement, if the traction force is 2kN?

Initial data: m (vehicle weight) = 1.5 t; a (the acceleration with which the car is moving) = 2 m / s ^ 2; F (engine thrust) = 2 kN = 2000 N.

SI system: m = 1.5 t = 1.5 * 1000 kg = 1500 kg.

We project all the acting forces on the ОХ axis and determine the resistance force:

m * a = F – Fc. and Fcopr. = F – m * a.

Payment:

Fc. = 2000 – 1500 * 2 = 2000 – 3000 = -1000 N (impossible, since the traction force is directed against the movement of the car; a traction force of 2 kN cannot impart an acceleration of 2 m / s ^ 2 to the car).