Question
A block is supported by a cord A from a rigid support and another cord B is attached to the bottom of block as shown. If we pull the string B steadily then which of the two cords will break? Assume cords A and B are identical.
Solution
When string B is pulled with force F, then
Tension in string B = F
Tension in string A = F+ mg.
Since tension in cord A is greater than in B, therefore, cord A will break.
Tension in string B = F
Tension in string A = F+ mg.
Since tension in cord A is greater than in B, therefore, cord A will break.
