Recent content by Celestiela

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    High School Watts=Newton-meters per second

    I've got to ask because I know my students will ask (they have a game where they try to stump the teacher with physics questions.) A Watt is equal to a Newton-meter per second, which is to say the amount of work done per second. Work is the amount of force applied for a distance. Ok, so a...
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    Help Me Understand Flux - Magnetically and Electrically

    But arent there infinitely many field lines?
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    Help Me Understand Flux - Magnetically and Electrically

    I'm totally confused as to what flux is... magnetically and electrically. MY professor was kinda talking it like it's a density of field lines, but then you start to read on about induction and other stuff, and flux doesn't make any sense anymore. If someone could help me out conceptually, that...
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    Moment of Inertia: 3 Point Mass, Massless Rods, Rotational Motion

    sweet! Thanks! :biggrin:
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    Calculating Force Needed to Pull Nail Out at 60 Degrees Angle

    Did you draw a free-body diagram? What forces are acting on that nail?
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    Help with Physics: Get a Deeper Understanding

    here's a little quick guide on which formula to use. I have these memorized and write them down immediately when I get to a test or something: Use this Equation......When this is missing and you don't need it v = v0 + at......X - X0 v^2 = v0^2 + 2a(X - X0)...t X - X0 = v0t +...
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    Moment of Inertia: 3 Point Mass, Massless Rods, Rotational Motion

    Simple question: I have 3 point masses of 110 kg apiece. All are connected by 3 massless rods to a massless point in the middle. The system will rotate about that point in the middle. The rods are 3.9 m long. They are 120 degrees apart from each other like: .| / \ Kinda. Anyways...
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    Believe it or not, I am able to do a lot of this stuff without the board

    :cry: And I thought you were my friend! :wink:
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    Believe it or not, I am able to do a lot of this stuff without the board

    We're not doing the Electric Fields yet, this should just be simple mechanics... So should I do Fapplied(x)=1/2kx^2?
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    Believe it or not, I am able to do a lot of this stuff without the board

    Well ok, how can I find the work done if i don't know the distance it's been pushed?
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    Believe it or not, I am able to do a lot of this stuff without the board

    It's just that it helps to understand what I'm doing. 4. [HRW6 7.PN.04.] The block in Fig. 7-10a lies on a horizontal frictionless surface and is attached to the free end of the spring, with a spring constant of 65 N/m. Initially, the spring is at its relaxed length and the block is...
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    Which to use->Dot or cross product

    D'OH Working on homework on the weekends again... :zzz: Thanks!
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    Which to use->Dot or cross product

    a crate is sliding (disregard friction) with d=(-3.0 m)i while a steady wind pushes against the crate F=(2.0 N)i + (-6.0 N)j How much work is done by the wind on the crate? Ok W=Fd so I want to multiply the two vectors together. [(-3.0 N)i ]*[(2.0 N)i + (-6.0 N)j ] Do I use a cross...
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    Why don't I get these free body diagrams?

    perfect! thank you all so much!
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    Why don't I get these free body diagrams?

    haha I love you guys