Recent content by jamesdubya

  1. J

    Solving the Puzzle: Forces & Acceleration

    It's 5kg. t1-t2=Iα and then I had a t1-t2 in my other equation that would cancel these out.
  2. J

    Solving the Puzzle: Forces & Acceleration

    M1=-µ*Mg+T1=ma m2 = T2*radius - T1*radius=Iα M3=-T2+Mg=ma µ*M1g+T1-T2+M3g=ma .36*1.1*9.81+5*9.81=1.6(a) 33.08=a is that right? I don't know how to find the radius for the disk
  3. J

    Solving the Puzzle: Forces & Acceleration

    no i had about 8 slept from 6-230ish...anyway...I just don't understand it, they may be silly to you but this makes 0 sense to me, that's why I came here, I wouldn't be here if i knew how to do it well.. I do appreciate your attempts at help though.. ok so then M2=t2*radius ?
  4. J

    Solving the Puzzle: Forces & Acceleration

    I fell asleep at 6 and woke up super early, I am up for the day.Can you please just help me with this I just am not understanding how to do torque..
  5. J

    Solving the Puzzle: Forces & Acceleration

    m2 is just a pulley it is just letting the rope go through it pretty much. So add a -T2 and set it = r x F which is =r x ma ?
  6. J

    Solving the Puzzle: Forces & Acceleration

    ok so then M2=M2+T1=I\alpha I don't really understand what you mean change a to a function of a sorry. Does this look at least a little better
  7. J

    Solving the Puzzle: Forces & Acceleration

    I tried to use it! it came out goofy looking.. By the big B i ment to put\alpha. M1=-µ*M+T1=ma M2= I \alpha= M2G+T2 M3=-T2+MG=ma what about now?
  8. J

    Solving the Puzzle: Forces & Acceleration

    M1=\mu*M-T1=ma M2=I\beta M3=-T2+MG=ma any better?
  9. J

    Solving the Puzzle: Forces & Acceleration

    ohh ok i see i see, thank you for your response... so M1=Muk*M+T1 M2=M*.5mr^2+T1-T2 M3=T2-mg any better?
  10. J

    Solving the Puzzle: Forces & Acceleration

    m1=T-MG-Fn-FF ? m2= ?? My only guess would be the previous equation. m3=T+MGH
  11. J

    Optimizing Boat Trajectory Across a River

    Thank you, you have been a huge help! I understand it now, it really isn't a difficult question at all.
  12. J

    How Do I Choose Between Sin, Cos, and Tan in Trigonometry Problems?

    No problem specifically, just more of a method question. I am extremely confused on when to use sin cos and tan. Say for instance it gives me an angle, say theta, and one side. How would I be able to tell what to use sin cos or tan. I know the trick SohCahToa but I really am confused. I am in a...
  13. J

    Solving the Puzzle: Forces & Acceleration

    I had just asked a question about boats going across a river but that question and this question really have me stumped. Homework Statement http://img138.imageshack.us/img138/7910/68512243.png A)Find the acceleration using Newtons laws B)Find the velocity using Conservation of Total...
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