Determine the force of resistance to movement, if a trolley with a mass of 1 t, under the action

Determine the force of resistance to movement, if a trolley with a mass of 1 t, under the action of a traction force of 700N, has acquired an acceleration of 0.2 m / s2.

m = 1 t = 1000 kg.

Ft = 700 N.

a = 0.2 m / s ^ 2.

Fsopr -?

Let us write 2 Newton’s law: F = m * a, where F is the resultant of the forces that act on the body, m is the mass of the body, a is the acceleration of the body.

The resultant forces F will be equal to the vector sum of the forces that act on the body: F = Fт + Fсopr.

Since the resistance force is directed in the opposite direction of the movement, then F = Fт – Fсopr.

Ft – Fcopr = m * a.

Fcopr = Ft – m * a.

Fcopr = 700 N – 1000 kg * 0.2 m / s ^ 2 = 500 N.

Answer: the body is affected by a resistance force Fcopr = 500 N.