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Two blocks M2-2M₁ = 4 kg are attached to the ceiling of an elevator cabinet and are connected by massless non-
stretchable strings as shown in the figure. The cabinet is accelerating downward at a constant rate of 4.7 m/s². The
magnitude of the tension 7, (in N) in the upper string is:
41.2
31.8
zero
50.6
22.4
T₁
M₁
T₂
M₂

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