If 5 m long aluminium wire of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire of the same length under the same weight
A. 1.75
B. 2.0
C. 2.3
D. 5.0
Best Answer
Ans :C
If the elongation in both wires (of same length) are same under the same weight, then d2y constant