Vehicle speed changes according to the law vx = 0.3t. Determine the traction force acting on the car if its mass is 1.2 tons.

Vx = 0.3 * t.

m = 1.2 t = 1200 kg.

Fx -?

We express the thrust force Fx in terms of 2 Newton’s law, according to which the force Fx, which acts on the body, is equal to the product of the body’s mass m by its acceleration ax: F = m * ax.

With uniformly accelerated motion, the speed of the body Vx changes according to the law: Vx = V0x + ax * t, where V0x is the projection of the initial velocity, ax is the projection of acceleration, t is the time of movement.

From the dependence from the condition of the problem it can be seen that V0x = 0 m / s, ax = 0.3 m / s ^ 2.

Fx = 1200 kg * 0.3 m / s ^ 2 = 360 N.

Answer: the traction force of the car is Fx = 360 N.