- #1
sajama
- 5
- 0
Hi,
Would appreciate any help anyone has for me.
I am building a physical pendulum of sort, which consists of a hollow cylinder, which I am going to fill with sand. I am going to let the sand flow out of the pendulum and investigate the change in period with changing mass.
I also am mathematically/computationally modelling this. I am currently trying to figure out the equations of motion that I'm going to need to model this. I know the equation for the period of a physical pendulum is T=2*pi*sqrt(I/mgh), where h will be changing at a constant rate.
I'm wondering how to calculate the moment of inertia. I've found equations on hyperphysics for common moments of inertia (http://hyperphysics.phy-astr.gsu.edu/HBASE/mi.html#) but as my pendulum is going to be partly a solid cylinder and partly a hollow one, I'm not sure how to merge these equations. Has anyone got any advice?
Thanks in advance :)
Would appreciate any help anyone has for me.
I am building a physical pendulum of sort, which consists of a hollow cylinder, which I am going to fill with sand. I am going to let the sand flow out of the pendulum and investigate the change in period with changing mass.
I also am mathematically/computationally modelling this. I am currently trying to figure out the equations of motion that I'm going to need to model this. I know the equation for the period of a physical pendulum is T=2*pi*sqrt(I/mgh), where h will be changing at a constant rate.
I'm wondering how to calculate the moment of inertia. I've found equations on hyperphysics for common moments of inertia (http://hyperphysics.phy-astr.gsu.edu/HBASE/mi.html#) but as my pendulum is going to be partly a solid cylinder and partly a hollow one, I'm not sure how to merge these equations. Has anyone got any advice?
Thanks in advance :)