Question

In the fig draw a tackle to lit a load by applying the torce in a convinient direction. Mark the position of load and effort.

(i) If the load is raised by 1 m, Through what distance will the effort move?

(ii) State how many strands of tackle are supporting the load?

(iii) What is the mechanical advantage of the sysytem?

Answer 1

correct winding of rope around pulleys, load and effort is as shown:

(i) Since there are five strings in the block and tackle system, therefore, the elocity ratio of the system is V.R = n 5

Now, V.R = `"d"_"E"/"d"_"L"`

or, `"d"_"E"` = 5 x `"d"_"L"` = 5 x 1 = 5m

(ii) 5 strands of tackle are supporting the load.

(iii) M . A = L/E

Here, L = 5T, E = T

M.A = `(5"T")/"T"` = 5