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Question
State whether the following statement is True or False.
A pulley changes the direction of force.
Options
True
False
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Solution
True.
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A boy uses a single fixed pulley to lift a load of 50 kgf to some height. Another boy uses a single movable pulley to lift the same load to the same height. Compare the effort applied by them. Give a reason to support your answer.
From the diagram given below. answer the question that follows:

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2) State the purpose of pulley B.
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(Neglect the weight of pulley A and friction)
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(i) Copy the diagram and mark the direction of tension on each strand of the string.
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The efficiency of a pulley is always less than 100%
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The alongside figure shows the combination of a movable pulley P1 with a fixed pulley P2 used for lifting up a load W.

(i) State the function of the fixed pulley P2.
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State one advantage of single movable pulley.
