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Three bags are connected by two ropes of equal strength. On pulling bags towards the left, which rope will break first?

0 votes

Bob has three bags connected by two ropes of equal strength. He pulls the bags on a rough horizontal ground towards the left as shown. Which rope will break first?

Which one will break first

posted Apr 23, 2017 by anonymous

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2 Answers

+2 votes

Here the rope 1 is withstanding 2 frictional forces ie., frictional forces between bag 2, bag 3 and sand. Rope 2 on the other hand withstands only 1 frictional force of that between bag 3 and sand.
Therfore tension in the ropes are as shown below
Rope 0 > Rope 1 > Rope 2
Since there is no mention of Rope 0 in the question Rope 1 is more likely to break among the 2.

answer Apr 30, 2017 by Tejas Naik
–1 vote

Rope 1 as it has to drag both bag 2 and bag 3.
Rope 2 only has to drag bag 3.

answer Apr 30, 2017 by Jcm

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