On a single rail trank, goods trains loaded with heavy iron material run starting from A to B and then empty wagons run from B to A. The amount of creep in the rails.

- 1
  
  will be more in the direction of B to A
- 2
  
  will be more in the direction of A to B
- 3
  
  will be maimum at the middle of A and B
- 4
  
  cannot be determined from the given data

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