A block and tackle has two pulleys in each block, with the tackle tied to the hook of the lower block and the effort being applied upwards. (a) draw a neat diagram to show this arrangement and calculate its mechanical advantage. (b) If the load moves up a distance x, by what distance will the fre end of the string move up ?

A block and tackle has two pulleys in each block, with the tackle tied

1.	A block and tackle has two pulleys in each block, with the tackle tied to the hook of the lower block and the effort being applied upwards. (a) draw a neat diagram to show this arrangement and calculate its mechanical advantage. (b) If the load moves up a distance x, by what distance will the fre end of the string move up ?
Answer» SOLUTION :(a) The arrangement is shown in Figure. Here the load is being supported by FIVE segments of the STRING. Therefore, L=5T and E=T `therefore M.A.=(L)/(E)=(5T)/(T)=5` (b) If the load moves up a distance x, the free end of the string will move up by a distance 5x. .