Figure shows a system of four pulleys. The upper two pulleys are fixed and the lower two are movable.
(a) Draw a string around the pulleys.
Also show the point of application and direction in which the effort E is applied.
(b) What is the velocity ratio of the system ?
(c) How are load and effort of the pulley system related ?
(d) What assumption do you make in arriving at your answer in part (c) ?

Answer

(b) 4 (c) load=`4xx`effort
Assumption: (1) There is no friction in the pulley bearings, (2) Weight of lower block of pulleys is negligible, (3) The effort is applied downwards.