First slide

Elastic behaviour of solids

Question

A force F is needed to break a copper wire having radius R. The force needed to break a copper wire of radius 2R will be

Moderate

A

F/2
B

2F
C

4F
D

F/4

Solution

Breaking Force $α$ Area of cross section of wire ( ${πr}^{2}$ )
If radius of wire is double then breaking force will become four times.

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