StrawHat Messages 33 Reaction score 0 Thread starter Jul 17, 2012 #1 Homework Statement Homework Equations r * [itex]\alpha[/itex] = atan r * [itex]\omega^2[/itex] = arad The Attempt at a Solution arad = (L/2)(3g/L) = 3g/2 atan = (L/2)(3g/2L) = 3g/4
Homework Statement Homework Equations r * [itex]\alpha[/itex] = atan r * [itex]\omega^2[/itex] = arad The Attempt at a Solution arad = (L/2)(3g/L) = 3g/2 atan = (L/2)(3g/2L) = 3g/4
Doc Al Mentor Messages 45,587 Reaction score 2,466 Jul 17, 2012 #2 StrawHat said: arad = (L/2)(3g/L) = 3g/2 How did you get this? atan = (L/2)(3g/2L) = 3g/4 Looks OK. (But don't forget the proper signs of the components.)
StrawHat said: arad = (L/2)(3g/L) = 3g/2 How did you get this? atan = (L/2)(3g/2L) = 3g/4 Looks OK. (But don't forget the proper signs of the components.)
StrawHat Messages 33 Reaction score 0 Jul 17, 2012 #3 I got arad = 3g/2 by multiplying r by ω2. EDIT: It was actually -3g/2. Going onto the reaction forces, I thought it was just R = ma, but apparently that's not the case... Re-EDIT: Got it. I just needed to add the negative signs. Last edited: Jul 17, 2012
I got arad = 3g/2 by multiplying r by ω2. EDIT: It was actually -3g/2. Going onto the reaction forces, I thought it was just R = ma, but apparently that's not the case... Re-EDIT: Got it. I just needed to add the negative signs.