A tyre of mass 15kg is suspended on a rope of length 7.5m and a girl of mass 75kg sits in the tyre. If the girls speed at the lowest point as she swings is 5m/s and the rope extends by 20cm, find the radius of this rope(young modulus = 2.0 x 10^11 Pa)
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Expert's answer
2021-02-02T09:32:27-0500
From the definition of the Young's modulus, we have:
E=AΔLFTL0=πr2ΔLmgL0.
From this formula we can find the radius of the rope:
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