Question

1. A 5 m long aluminium wire (Y = 7 * 100 N m2) of
diameter 3 mm supports a 40 kg mass. In order to have
the same elongation in a copper wire (Y = 12 x 10°N m 2
of the same length under the same weight, the diameter
should now be (in mm).​

Answer 1

Answer:

A 5m aluminium wire (Y = 7 × 1010 N/m2) of diameter 3mm supports a 40 kg mass. In order to have the same elongation in copper wire (Y =12 x 1010 N/m2) of the same length under the same weight, the diameter should be in mm : 1.75.