Recent content by tornzaer

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    3D projectile motion with constant wind force

    How can I make it in terms of x and y components when I have a z component as well?
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    3D projectile motion with constant wind force

    Anyone? I need some help because this is due tomorrow morning.
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    3D projectile motion with constant wind force

    Homework Statement A projectile of mass 1 kg is launched from ground level toward the east at 200 metres per second, at an angle of pi/6 to the horizontal. A northerly win applies a force of 2 Newtons to the projectile. Find the location of the projectile and its speed at impact. Homework...
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    Why does L'Hôpital's rule fail for lim(sin(x)−x)/x³?

    That's not the answer according to calculators.
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    Why does L'Hôpital's rule fail for lim(sin(x)−x)/x³?

    Third would be -cosx/6
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    Why does L'Hôpital's rule fail for lim(sin(x)−x)/x³?

    The first time applied gives me: (cosx - 1) / 3x^2 The second: (-sinx) / 6x I definitely know this is wrong...
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    Why does L'Hôpital's rule fail for lim(sin(x)−x)/x³?

    Homework Statement lim -> 0 (sin(x)-x) / x^3 Homework Equations L'Hospital's Rule The Attempt at a Solution I could just use L'Hospital's rule since it's 0/0. However, the answer is wrong when I do it that way. What am I missing? It states on the question that it must be...
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    Salt concentration in a brine tank with inflow and outflow

    Alright. How would I go about setting up the equation then? I'm still not clear on that.
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    Salt concentration in a brine tank with inflow and outflow

    Homework Statement A tank is initially filled with 1000 litres of brine, containing 0.15 kg of salt per litre. Fresh brine containing 0.25 kg of salt per litre runs into the tank at the rate of 4 litres per second, and the mixture (kept uniform by stirring) runs out at the same rate. Show...
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    Right Hand Rule - Positive or Negative Action

    Thanks for the replies. What happens if vectors aren't connected like the ones on the diagram I posted. There are vectors in the same direction and different directions, but they are all separate. Also, on question b on the diagram, it asks to find the sum of moments at B. That's what I'm...
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    Right Hand Rule - Positive or Negative Action

    Homework Statement http://img41.imageshack.us/i/photolu.jpg/ Homework Equations Right Hand Rule The Attempt at a Solution I have to find the moments at B. I know I have to use the right hand rule to figure out which force has a positive and which force has a negative action...
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    Line through points, line-circle intersection, and quadratic with two distinct roots

    3) So it will be (3)^2-4(4k)(k) which is 9-16k^2 > 0.
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    Line through points, line-circle intersection, and quadratic with two distinct roots

    2) How do I go about solving the system of equations? 3) How can I find a,b,c when I don't know what K is?
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    Line through points, line-circle intersection, and quadratic with two distinct roots

    2) What am I to do with the radius though? 3) I'm not too clear on this. Could you give an example?
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    Line through points, line-circle intersection, and quadratic with two distinct roots

    2) 5/2. I subtracted instead of adding... 3) So k has to be a positive number?
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