Two masses (mA = 3 kg, mB = 6 kg) are attached to a (massless) meter stick, at the 0 and 75 cm marks, respectively. a. Now, if mass B was removed, how much force would need to be exerted at the 100 cm mark in order to keep the meter stick level? b. Now, if mass B was removed, and no additional force was supplied, calculate the size of the angular acceleration of the meter stick at that instant. For a I was clueless on how to approach the problem, but for b, I used angular acceleration = torque/inertia, and got 0.8889, but got it wrong. I tried it again, plugging in different values for r and F, and got 13.066, and still got the problem wrong. I thnk my problem is that I am not using the correct values to solve this problem. Anybody know exactly which values I should use? Thanks!