Three masses m₁, m₂ and m₃ are connected in succession by massless strings on a frictionless table. If m₃ is pulled by force T, the tension in the string between m₂ and m₃ is:
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Question

Three masses m₁, m₂ and m₃ are connected in succession by massless strings on a frictionless table. If m₃ is pulled by force T, the tension in the string between m₂ and m₃ is:

G1 Physics · Accepted Answer

Common acceleration is T/(m₁+m₂+m₃). The tension between m₂ and m₃ must accelerate m₁+m₂, so T₂₃=(m₁+m₂)T/(sum). Option C.