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Question

An Atwood machine is set up like the figure below. If m1=5.0kg and m2=15kg. What is the tension in the rope? Take the value of g=10ms2)

A
25N
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B
50N
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C
75N
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D
100N
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Solution

The correct option is C 75N
Generally the tension in the rope in the case of Atwood machine is calculated as:
T=2m1m2gm1+m2
where, m1 and m2 is the mass of block 1 and 2 and g is the acceleration due to gravity.

Here, m1=5kg and m2=15kg
Therefore,
a=2×15××105+15=75N

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