Question

find the stress to be appliyed to a steel.wire to strach it

Answer 1

We know that,

Area= 1cm i.e 1×10^-4 m^2

Length and extension of wire is=X

Force =?

Y=2×10^11

We know that

Y=F/A *L/l

Or, Y=F/A. (L=l so it cancelled)

Or 2*10^11*10^-4=F

Or F =2×10^7. Ans