Hi,

 

A body of mass 'm' is suspended from a rubber cord with force constant 'k'. What is the maximum distance over which the body can be pulled down further for the body's oscillation to remain harmonic?

 

thanks.

i believe it should g mg/k

as mass wil remain same on elongation

in my answer

x should b less than elastic limit (which is experimental) 

if comes out 2 b greater then no oscillation