Physics
From the diagram given below, answer the questions that follow:
(i) What kind of pulleys are A and B?
(ii) State the purpose of pulley B.
(iii) What effort has to be applied at C to just raise the load L = 20 kgf?
(Neglect the weight of pulley A and friction).
Machines
ICSE 2016
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Answer
(i) A is a movable pulley and B is a fixed pulley.
(ii) The purpose of pulley B is to change the direction of effort (i.e., in downward direction).
(iii) Given, Load = 20 kgf , M.A. = 2
From relation,
Substituting the values in the formula above we get,
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