ReasoningModerate1 mark
2(iv)
Meera chose to use a block and tackle system of ‘9’ pulleys instead of a single movable pulley to lift a heavy load.
Why should she connect more number of pulleys in the upper fixed block?
Topic: Pulley arrangement and moving mass
Question wording verified against source paper
Answer
Exam answer
More pulleys are placed in the fixed upper block to reduce the weight of the moving block and improve practical efficiency.
Explanation
Only the lower block moves with the load; keeping more pulleys fixed reduces the moving mass.
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The Velocity Ratio (VR) of a block and tackle system of two pulleys with the effort in the upward direction is:
(a) 1
(b) 2
(c) 3
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