Recent content by Ockham

  1. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    Ok so I did get lucky but I see what I did wrong! If I would have gotten the right equation for F2, my next step would have been to take the derivative , set it equal to zero and then I would have found my angle. Which is 70 degrees! And the trig ID you where referring was the sin(a + b) =...
  2. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    Orodruin, Thanks for your guidance on this problem it taught me a lot and I probably would have been lost without it! But I am curious about your equation now... because the answers I got using the equation I found for F2 gave the correct answers. Not only that but it is derived directly from...
  3. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    Here's what I have so far...solving for F1 in (2) and plugging that into (1) I found: F2 = 910sin20/(sinθ + sin20cosθ) and this will be minimized when (sinθ + sin20cosθ) is as large as possible. If theta is 90 then F2 is equal to 910sin20. If theta is 0 then F2 is equal to 910 which I have a...
  4. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    I would just solve (1) and (2) and get the magnitudes of the F1 and F2.
  5. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    Thanks I'll keep working and let you know what I come up with
  6. O

    Solve 2D Statics Problem: F1, F2, θ w/ 910N Force

    Homework Statement The truck is to be towed using two ropes. If the resultant force is to be 910N directed along the positive x axis, determine the magnitudes of force F1 and F2 acting on each rope and the angle θ of F2 so that the magnitude of F2 is a minimum. F1 acts at 20° from the...
  7. O

    Determine if S is a subspace of V

    And in response to: check to make sure that you copied (F) down correctly. It's copy pasted. But checked anyway and it's correct.
  8. O

    Determine if S is a subspace of V

    No harm done. How could I possibly be offended? I have no experience with these problems. Thank you both for your time and patience. This has been enlightening.
  9. O

    Determine if S is a subspace of V

    Im supposed to pick the ones that are sub spaces. The ones under "I chose" are the ones a chose and the ones under" I did not choose", i did not choose. I hope that clears it up. I'm supposed to look to see if scalar multiplication and vector addition hold.
  10. O

    Determine if S is a subspace of V

    subspace is a non empty vector space where the rules for vector addition and scalar multiplication are the same as the vector space it's a part of...so how would one prove that for these instances?
  11. O

    Determine if S is a subspace of V

    My answers aren't all correct and I am not sure why.. Problem: Determine whether the given set S is a subspace of the vector space V. A. V is the vector space of all real-valued functions defined on the interval [a,b], and S is the subset of V consisting of those functions satisfying...
  12. O

    Rocket Problem: Determining the amount of fuel burned

    OH...thanks. I get it now. The Thrust is constant the only thing that changes is the mass. Which I can solve for. Thank you! Ockham
  13. O

    Rocket Problem: Determining the amount of fuel burned

    How do I determine the amount of fuel burned?
  14. O

    Rocket Problem: Determining the amount of fuel burned

    The set up: A 20,000kg rocket has a motor that generates a thrust of 3x10^5 N. The problem: a)What is it's initial Acceleration? b)At an altitude of 5,000m the rockets acceleration has increased to 6 m/s^2, what mass of fuel has it burned? Relevant equations: F = ma The...
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