Calculate the strain on the rope. A 10 meter long rope is streched 3.0 cm when a man hangs on it's end.
One way to calculate strain is: (change in length) / (initial length)
3.0 cm / 10 m = 3.0 cm / 1000 cm = 3/1000 = 0.003
Thanks Geno, I thought strain would have some kind of unit attached to it
Is that a normal way to do it?
Hi Melody, Geno is right, Strain is a dimensionless ratio (you might be thinking of Stress which has dimensions of force per unit area).
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Thanks Alan, I wasn't thinking of anything. I know very little physics :)
So strain does not have anything to do with breaking point then?
I mean elastic can double in length without breaking but most things break much more quickly :/