a 4.0 m long steel wire has a cross sectional area of 0.050 cm^2. Its proportion

Question

a 4.0 m long steel wire has a cross sectional area of 0.050 cm^2. Its proportional limit has a value of 0.0016 time its young's modulus. Its breaking stress has a value of 0.0065 times its young's modulus. the wire is fastened at its upper end and hangs vertically.

A)
How great a weight can be hung from the wire without exceeding the porportional limit? take the young's modulus for the rod to be y=2.0x10^11 Pa

B)
How much will the wire stretch under this load


please use 2 sig figs for each answer

Explanation / Answer

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