A brass wire 2.5m long of cross section area1.0*10 -3 cm^2 is stretched 1mm by a

Question

A brass wire 2.5m long of cross section area1.0*10-3 cm^2 is stretched 1mm by a load of 0.40 kg.calculate the young modulus for brass(take g=10m/sec^2) what percentage of strain does the wire suffer ? use value of E to calculate the force required to produce a4.0% strain in the same wire .is your answer for the force reliable? if it is not would it be greator or lesss than your answer ?Explain A brass wire 2.5m long of cross section area1.0*10-3 cm^2 is stretched 1mm by a load of 0.40 kg.calculate the young modulus for brass(take g=10m/sec^2) what percentage of strain does the wire suffer ? use value of E to calculate the force required to produce a4.0% strain in the same wire .is your answer for the force reliable? if it is not would it be greator or lesss than your answer ?Explain

Explanation / Answer

Length L = 2.5 m

Area A = 1 * 10 ^ -3 cm ^ 2= 10 ^ -7 m^2

Strached length e = 1 mm = 10^-3 m

Load F =mg = 0.4 * 10 = 4 N

Young’s modulus Y = ( F/A ) ( L / e )

                                = 1*10^11 N /m^ 2

Percentage of strain = ( e/L ) * 100

                                = 0.04 %

(c). strain percentage = 4 % = 0.04

                       e/L = 0.04

                          e = 0.04 L = 0.1 m

for more starin we apply more force

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