tag:blogger.com,1999:blog-31189917.post2949608846338886442..comments2024-03-11T04:40:23.756-07:00Comments on The Blog of Phyz: Torsional pendulumDean Bairdhttp://www.blogger.com/profile/17681829220589441713noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-31189917.post-39125603751380166642019-01-27T12:34:49.002-08:002019-01-27T12:34:49.002-08:00Almost any spring will work for a torsion pendulum...Almost any spring will work for a torsion pendulum. I hang a 1 kg cylindrical mass from a hardware store spring, give it a twist, and let go. Can show period is independent from amplitude. Measure period, calculate I of mass as a solid cylinder and you can find the torsion constant. Then you can measure I of anything you hang from the spring using the period. Can estimate torsion constant by inserting dowel in end of spring and twisting it a known amount until you get a decent amount of force to measure with a force sensor. Torsion constant is force x lever arm/angle. Dan Burnshttps://www.blogger.com/profile/02319981523410756611noreply@blogger.com