Question

A block of mass M is attached to the lower end of a
vertical spring. The spring is hung from a ceiling and
has force constant value k. The mass is released
from rest with the spring initially unstretched. The
maximum extension produced in the length of the
spirng will be:
[AIPMT (Prelims)-2009]​

Answer 1

Answer:

Use the line of conservartion of energy let `x` be the execsion in the spring

Appliying conservation of energy

`mgs - (1)/(2) kx^(2) = 0 - 0 rArr x = (2mg)/(k)`