The breaking stress for a metal wire is 2 xx 10^(8)Nm^(-2). Density of metal =8 xx 10^(3) kg m^(-3). Calculate the maximum length of copper wire which will not break under its own weight, when held in vertical position.

The breaking stress for a metal wire is 2 xx 10^(8)Nm^(-2). Density of

1.	The breaking stress for a metal wire is 2 xx 10^(8)Nm^(-2). Density of metal =8 xx 10^(3) kg m^(-3). Calculate the maximum length of copper wire which will not break under its own weight, when held in vertical position.
Answer» SOLUTION :Breaking stress `=(Mg)/(A) = ((AL rho)g)/(A) = L rho g` `:. L= ("Breaking stress")/( rho g)` or `L= (2 XX 10^(8))/(8 xx 10^(3) xx 10) or L= 2500m`