The diagram alongside shows an arrangement of three pulleys A,B and C. the load is marked as L and the effort as E.
(a) Name the pulleys A,B and C.
(b) Mark in the diagram the directions of load (L), effort (E) and tension `T_1 and T_(2)` in the two strings.
(c) How are the magnitudes of L and E related to the tension `T_(1)` ?
(d) Calculate mechanical advantage and velocity ratio of the arrangement.
(e) What assumptions have you made in parts (c) and (d) ?

Answer

(a) A and B-movable pulleys, C-fixed pulley.
(c) L=4`T_(1),E=T_(1),` (d) M.A.=4, V.R.=4
(e) The pulleys A and B are weightless and there is no friction.