91. The speed of rotation of the wheel, the moment of inertia of which 2 kg • m2 rotating braking ravnozamedlenno, during the time t = 1, m decreased from n1 = 300 min-1 to n2 = 180 min-1. To determine: 1) the angular acceleration ε wheel; 2) The moment M brake force; 3) the work of the braking force.

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