tension T in each strand.
18. Give reasons for the following:
(a) In a single fixed pulley, the velocity ratio is
always more than the mechanical advantage.
(b) The efficiency of a movable pulley is always
less than 100%.
(C) In case of a block and tackle system, the
Lligotromechanical advantage increases with the
increase in the number of pulleys.
(d) The lower block of a block and tackle pulley
system must be of negligible weight on
quarta
19. Name a machine which is used to
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