Question

The diameter of a brass wire is 0.6 mm and Young's
modulus Is 9 * 1010 N/m2. The force which will
Increase its length by 0.4% is about​

Answer 1

Explanation:

d=.6mm. r=.3mm

l'/l=.4

Y=stress/strain

stress=Y*strain

force/πr^2=Y*strain

force=πr^2*Y*strain