10. Powerboat mass m = 400 kg begins to move across the lake. Tractive force F engine is 0.2 kN. Considering the resistance force proportional to the velocity Ac, determine the speed of the boat through a υ Δt = 20 s after the beginning of its motion. The drag coefficient k = 20 kg / s.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)