Block A of weight 100 N rests on a frictionless inclined plane of slope angle 30^(@) A flexible cord attached to A passes over a frictionless pulley and is connected to block B of weight W Find the weight W for which the system is in equilibrium .

Block A of weight 100 N rests on a frictionless inclined plane of slop

1.	Block A of weight 100 N rests on a frictionless inclined plane of slope angle 30^(@) A flexible cord attached to A passes over a frictionless pulley and is connected to block B of weight W Find the weight W for which the system is in equilibrium .
Answer» Solution :As is clear from the system will be in equibrium, when force on block `A` , up the plane is equal to force on `A` down the inclined Plane `W = mg sin 0 = mg sin 30^(@) = 100 XX(1)/(2) = 50 N` .