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Question

Three block of masses m1,m2 and m3 are connected by massless string as shown on a frictionless table. They are pulled with a force T3=40 N. If m1=10 kg,m2=6 kg and m3=4 kg, the tension T2 will be
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A
20 N
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B
40 N
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C
10 N
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D
32 N
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Solution

The correct option is D 32 N
Total mass of system =20kg
Acceleration of system =40n
A=f/m
=40/20
=2
Because string t2 pulls 1 and 2 blocks
Therefore t2=(m1+m2)a
=32N
Hence,
option (D) is correct answer.

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