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).

Question

(i) 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). 

(ii) The pulley system drawn lifts a load of 150 N when an effort of 60 N is applied. Find its mechanical advantage. 

(iii) Is the above pulley system an ideal machine or not?

Answer 1

(i) The diagram is shown below :

(iii) No, the pulley system is not ideal because M.A < V.R.