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Question

Three identical particles are joined together by a thread as shown in figure. All the three particles moving in a horizontal plane. If the velocity of the outermost particle is v0 then the ratio of tensions in the three sections of the string is then

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A
3: 5: 7
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B
3: 4: 5
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C
7: 11: 6
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D
3: 5: 6
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Solution

The correct option is D 3: 5: 6
Assume mass of each ball is m
V0=3wL
w=V03L
For Ball A force due to ratio on 1L
mw2L=mV0aL
For B=mw2(2L)=mV09L
For C=mw23L=mV03L
From digname
Let = Tension defined as (T).
T Between B and C=mV0/3C=T1
T Between A and B=2mV0aL+mV03L=T2
T Between U and A=mV0aL+2mV0aL+mV03L
=2mV03L=T3
T1:T2:T3=13:59:23
=13×9:59×9:23×9
=3:5:6.

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