A question on Newton's laws and tension

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SUMMARY

The discussion focuses on a physics problem involving Newton's laws of motion and tension in a railway system. The scenario describes a railway engine pulling two carriages of equal mass with uniform acceleration, where the tension in the coupling between the engine and the first carriage is denoted as T. The correct deduction for the tension in the coupling between the first and second carriages is T/2. Participants emphasize the importance of drawing free body diagrams and applying Newton's laws to solve for the unknowns.

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  • Knowledge of uniform acceleration concepts
  • Familiarity with simultaneous equations
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  • Learn how to effectively draw and analyze free body diagrams
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Charismaztex
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Homework Statement



A railway engine pulls two carriages of equal mass with uniform acceleration. The tension in the coupling between the engine and the first carriage is T. Deduce the tension in the coupling between the first and second carriages.

Homework Equations





The Attempt at a Solution



I have tried drawing free body diagrams but have not fully understood how this problem works. I can't seem to get the correct answer T/2.


Any help appreciated,
Charismaztex
 
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You have 2 unknowns (T_12 and a) , so you'll need to draw 2 free body diagrams, apply Newton's laws, and solve the simultaneous equations. Which 2 did you choose?
 

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