A wire elongates by when a load is hanged from it. If the wire goes over a pulley and two weighs each is hung at the two ends, the elongation of the wire will be (in )
Step 1: Given the information and formula used
Length is given as and load is .
According to Hooke's law
Modules of elasticity,
- original length of the wire
- cross-sectional area of the wire
Step 2: Determine the elongation
Elongation
On either side of the wire, tension is W and length is
Total elongation in the wire
Therefore, the total elongation in the wire is calculated as .
Hence, option (B) is correct.