Question

To break a wire, a force of $3 \times 10 ^ { 3 } \mathrm {~kg} / \mathrm { m } ^ { 3 }$, 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

Answer: (A)

34 m

Answer 2

Length of the wire which will break by its own weight $L = \frac { P } { d g } = \frac { 10 ^ { 6 } } { 3 \times 10 ^ { 3 } \times 10 } = \frac { 100 } { 3 }$ m ≃ 34 m.