A body is supported by a spiral spring and causes a stretch of 1.5cm in the spring. If the mass is now set in vertical oscillation of small amplitude, what is the periodic time of oscillation
Doesn't angular frequency= sqrt (k/m) ?
where k= mg/.0015
or 2PI/T= sqrt (g/.0015)
solve for period T.
http://hyperphysics.phy-astr.gsu.edu/hbase/shm.html