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Question

In the figure shown, find the tension T1 in the string. Take g=10 m/s2


A
2g
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B
3g
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C
2.5g
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D
4g
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Solution

The correct option is D 4g
Since 10 kg>(2+3) kg, the 10 kg mass will move downward.

Acceleration of the system
a=Supporting mass - Opposing massTotal mass
=10g5g15=g3 m/s2

FBD of 3 kg mass :

T13g=3a
T1=3(g3)+3g=4g N

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