Question

A wire is suspended from the ceiling and stretched under the action of a weight F suspended from its other end. The force exerted by the ceiling on it is equal and opposite to the weight.

• A. Tensile stress at any cross section A of the Wire $\frac{F}{A}$ is
• B. Tensile stress at any cross section is zero.
• C. Tensile stress at any cross section A of the wire is $\frac{2F}{A}$
• D. Tension at any cross section A of the wire is 2F.

Answer 1

Answer: (A)

Tensile stress at any cross section A of the Wire $\frac{F}{A}$ is

Answer 2

: When a wire is suspended from the ceiling and stretched under the action of a weight (F) suspended from its other end, the force exerted by the ceiling on it is equal and opposite to the weight, however, the tension at any cross-section A of the wire is just F and not 2f. Hence, tensile stress which is equal to the tension per unit area is equal to F/A