12. Load mass m = 80 kg lift along the inclined plane with an acceleration of a = 1 m / s2. The length of the inclined plane of l = 3 m, and the angle of its inclination to the horizontal shot 30 °, and the friction coefficient f = 0,15. Determine: 1) the work done by the lifting device; 2) its average power; 3) its maximum capacity. The initial speed of the load is equal to zero.

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