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Question

In order to raise a mass of 100kg, a man of mass 60kg fastens a rope to it and passes the rope over a smooth pulley. He climbs the rope with acceleration 5g/4 relative to the rope. The tension in the rope is (take g=10ms2):

A
1550N
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B
1700N
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C
2100N
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D
1350N
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Solution

The correct option is D 1350N
From figure, TMg=Ma1(1)Tmg=ma(2)
where M=100kg
m=60kg
a1= acceleration of block
a=5g4
(2)T=ma+mg
F=m(a+g)
=60(g+5g4)
=60×9g4
=54004
=1350N.

1087854_980349_ans_387c9e662ac84bb79bf23d3102cfbf4a.jpg

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