Recent content by ccmuggs13

I'm studying for an upcoming final and this is a question from a practice exam we were given. It looks simple but for some reason I just can't wrap my brain around it. The question is attached and gives a state space representation of a system (A, B, C matrices) and asks what part of the system...

Oh I think I see that you did take angular motion into account as opposed to just linear which is why you have the kinetic energy of the bar start with 1/6 as opposed to 1/2 But unless I am doing my calculations wrong I am still getting a negative kinetic energy... Please check the...

Oh yea I completely forgot about the spring constant, it was 2000N/m. And the equilibrium position is equilibrium for the spring. Also can you use the linear kinetic energy formula for this? Because a large portion of our test involved angular velocity and the problem gave us a hint...

I just took a physics test today and there was one problem that I cannot figure out if I did correctly. The problem involves a catapult pictured here: http://i39.tinypic.com/a2t76h.jpg The bar is 2m long and has a mass of 3kg. The rock at the end of it has a mass of 5kg. The spring is .3m from...