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 = W/πr² = F

W = Fxπr²

Now,

area = π(2r)² = 4πr², then

Stress = W/4πr² = Fxπr²/4πr² = F/4