Question

A uniform wire, fixed at its upper end, hangs vertical
and supports a weight at its lower end. If its radius is
its length L and the Young's modulus for the material
of the wire is E, the extension is
1. directly proportional to E
2. inversely proportional to r.
3. directly proportional to L
(a) if 1, 2, 3 are correct
if 1, 2, are correct
(c) if 2, 3 are correct
(d) if 1 only is correct
(e) if 3 only is correct.​

Answer 1

Answer:

123 are correct

e=yl/fa