I am working on Computational physics homework and it asks to find the kinetic and potential energy of a simple pendulum. My only issue is that i don't know how to solve it without mass. It gives me : theta (pendulum angle) omega (pendulum angular Velocity) t (time) length (length of string) dt (time step) I was looking at the kinetic energy equation and maybe I need to use Inertia for where KE = (1/2) (inertia)(omega) ? but then how would i find inertia? Any help would be appreciated.