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Q.

In the figure shown, a person wants to raise a block lying on the ground to a height h. In both the cases, if time required is the same, then in which case, he has to exert more force. (Assume pulleys and strings are light)

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a

(i)

b

(ii)

c

Same in both

d

Cannot be determined

answer is A.

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Detailed Solution

In first case,In second case,∴ In first case, person will have to apply more force.

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In the figure shown, a person wants to raise a block lying on the ground to a height h. In both the cases, if time required is the same, then in which case, he has to exert more force. (Assume pulleys and strings are light)