A particle of weight 200 N lies on an inclined plane. The plane is inclined at 30 to the horizontal. A horizontal force F is applied to the particle. The coefficient of friction between the particle (a) 7. 3 and the inclined plane is . 8 30 Find, the least value of F that will move the particle up the plane. (b) Three identical rods, each of weight W, are freely jointed together to form a triangle. The framework is suspended by a light inextensible string from the mid-point of the rod [AB]. Calculate: the tension in the string (i) (ii) the reactions at each of the joints A, B and C.