Recent content by disb

thanks rock, took me a while to fully understand it and get it sunk in my head,, i was just thinking to hard

nvm, i got it i think... i am just thinking too hard.. if its partial w.r.t theta(dot), then everything (like theta_double_dot or theta) is considered constant except theta(dot) if partial w.r.t theta(triple dot), then everything is constant except theta(triple dot) if partial w.r.t. u(double...

Ok, and what about part 2 of my question? "partial y w.r.t. theta" for the first term is..? Is the first term a constant in this case??

So how would take partial derivative of: y = .5*m*(L*theta_dot)^2 + .5*m*g*L*cos(theta) 1) partial y with respect to theta_dot AND 2) partial y with respect to theta

When I am taking a partial derivative of an equation with respect to theta_dot, then theta is constant, right? What if I am taking partial derivative with respect to theta, will theta_dot be constant? In this case, theta_dot = omega (angular velocity), but I must keep equation in terms of...