What kind of pulleys are A and B

Force, Work, Power, Energy (10)

From the diagram given below, answer the questions that follow:

  1. What kind of pulleys are A and B?
  2. State the purpose of pulley B.
  3. What effort has to be applied at C to just raise the load L=20kgf?
    (Neglect the weight of pulley A and friction).

Answer

  1. A is movable pulley and B is fixed pulley.
  2. So as to apply the effort in a convenient direction that is vertically downwards.
  3. M. A. = 2 = 20/𝐸 Therefore , E = 10kgf
  • Exam Year: 2016