Question

The breaking stress for a wire of radius r of given material is F N/m^2.The breaking stress for the wire of same material of radius 2r is

Answer 1

Answer:

F/4

Explanation:

stress = weight/area

weight = stress x area

Now,

Weight is same in both the above cases, then

stress1 x area1 = stress2 x area2

F x πr² = stress2 x π(2r)²

F x πr² = stress2 x 4πr²

stress2 = F/4