Message 2620 from Sola Abiona, 12 April 2007 17:56:
In response to message 1135: www.physicsforum.co.uk from physicsforum UK , 30 September 2003:
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