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A wire is suspended from the ceiling and...

A wire is suspended from the ceiling and stretched under the action of 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 is `(F)/(A)`.

B

Tensile stress at any cross section is zero.

C

Tensile stress at any cross section A of the wire is `(2F)/(A)`.

D

Tension at any cross section A of the wire is 2F.

Text Solution

Verified by Experts

The correct Answer is:
A
 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 uhe wire is just F and not 2F.
Hence, tensile stress which is equal to the tension per unit area is equal to `F//A`.
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