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In the arrangment as shown below m(1) = ...

In the arrangment as shown below `m_(1) = 1 kg, m_(2) = 2 kg ` . Pulleys are massless and strings are light . For what value of M the mass `m_(1)` moves with constant velocity . ( Neglect Friction)

A

4 kg

B

8 kg

C

6 kg

D

10 kg

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The correct Answer is:
B
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