A 25-kw shunt generator is delivering full output to 400-V bus-bars and is driven at 950 r. p.m by belt drive. The belt breaks suddenly but the machine continues to run as a motor taking 25Kw from the bus-bars. At what speed does it run? Take armature resistance including brush contact resistance as 0.5 and field resistance as 160. ​

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.