Draw a diagram to show a block and tackle pulley system having a velocity ratio of 3 marking the direction of load(L), effort(E) and tension(T)

  1. Draw a diagram to show a block and tackle pulley system having a velocity ratio of 3 marking the direction of load(L), effort(E) and tension(T).
  2. The pulley system drawn lifts a load of 150 N when an effort of 60 N is applied. Find its mechanical advantage.
  3. Is the above pulley system an ideal machine or not?

Answer

  1.                                                                                                                                              Two pulleys in block and one pulley(movable) in tackle, their proper connection, marking directions of load(L) and effort(E) and at least one tension and the support. Strands should be stretched.
  2.  M. A. = L/E = 150/60 = 2.5
  3.  No, it is not an ideal system.