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  1. A

    Cart + loop

    I'm having trouble getting started on this entire problem. I've re-drawn it, I'm given the mass of the cart, and the radius of the loop.. but I have absolutely no idea how I can calculate even the first part of this (minimum high h). I'd greatly appreciate any help anyone could offer. Thank...
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    Blocks on turntable

    Thank you for your help everyone, I finally figured it out, only I had forgotten to convert my radii to meters, so instead of 14.01 (the correct answer), I kept getting 1.4. Again though, I REALLY appreciate the help. The definition of angular frequency really helped too. Aki
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    Blocks on turntable

    huskydc: my aim name is forestkelp, if you're still around
  4. A

    Blocks on turntable

    When I solve equation 1 for T, and stick that into equation two, I can't seem to solve it. All of the masses cancel out (each term has a mass, so dividing by m cancels them all out), but then when I try to solve it, it doesn't work. (w = theta) 1) T - umg = m R1 w^2 2) -T - umg = m R2...
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    Blocks on turntable

    How can I get those masses to cancel out? I'm ending up w/three unknowns. Tension, mass, and theta. :\
  6. A

    Blocks on turntable

    The string only connects the two blocks, it is not attached to the turntable in any way.
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    Blocks on turntable

    Is R1 = 2, and R2 = 6, are those the two radii? I don't understand where I find the theta from for each equation, since I don't have an angle? I have it all drawn out on a whiteboard, but I think there's something I'm missing. Or is the theta in those equations the angular frequency, and thus...
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    Blocks on turntable

    What is the capital R in those equations? I'm sorry. I'm so lost. :(
  9. A

    Block on an accelerating inclined plane

    Thank you so much!! I figured it out! I think my main problem was making the wrong assumption on the angle. I feel so stupid now. :) Thank you! A
  10. A

    Blocks on turntable

    I've been working on this one again all morning. :\ In the vertical direction, the only forces are the normal force and the weight, which cancel each other out. In the horizontal direction, are the only two forces the static friction (pointing toward the center of the turntable for both...
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    Blocks on turntable

    It would seem that husky and I are either in the same physics class, or using the same homework system. :) I'm still having trouble with this one (this and the accel plane are killing me). This is my problem: Two identical blocks are tied together with a string and placed along the same...
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    Block on an accelerating inclined plane

    This is the same problem I've been having (my numbers are different, mass is 1.8kg, lower left corner is 28 degrees, and my static coefficient is .74. I can't figure out where I've gone wrong. :( 1) Weight (mg): horizontal component = 0 vertical component = (mass of block)(9.81m/s^2)...
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