The force acting on the path 0.8 km in the direction of travel performed the work of 200 kJ. determine the modulus of this force.

S = 0.8 km = 800 m.
A = 200 kJ = 200000 J.
F -?
The work done by the force is determined by the formula: A = F * S * cosα, where F is the force acting on the body, S is the displacement under the action of this force, α is the angle between the direction of action of the force F and displacement S.
Since the force F acts in the direction of displacement S, then α = 0, cos0 = 1.
A = F * S.
F = A / S.
F = 200,000 J / 800 m = 250 N.
Answer: a force F = 250 N acts on the body.