Sunday, March 2, 2008
As shown in figure two pulleys can rotate about their axis. Stationary plate is simply supported on these two pulleys. Now the weight of stationary plate applied on each pulley in vertical downward direction is Mg/2. This Mg/2 will divided in two parts. One is tangential and second is towards the center. Tangential part will help to rotate pulleys and toward the center part will generate the friction.