Решение задачи по физике раздел 54 пункт 7 механика

7. Tractor mass 10 m passes through the bridge at a speed of 10 m / s. What is the pressure force of the tractor in the middle of the bridge when the bridge; 1) flat; 2) convex with a radius of curvature of 200 m; 3) concave with same radius of curvature.

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