Question

To break a wire, a force of 10⁶ N/m² is required. If the density of the material is 3 × 10³ kg/m³, then the length of the wire which will break by its own weight will be(a) 34 m(b) 30 m(c) 300 m(d) 3 m

Answer 1

hope it helps ...
the so called force is actually Stress
stress=F/A.
then F=mg=density×vol=density×area×length