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In the arrangement shown in figure m(1)=...

In the arrangement shown in figure `m_(1)=1kg, m_(2)=2kg`, pullyes are massless and strings are light. For what value of M the mass `m_(1)` moves with constant velocity? (Neglect friction)

A

6kg

B

4 kg

C

8 kg

D

10 kg

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The correct Answer is:
C
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