posted by .

I have an incredibly tough problem that I need help solving.

h ttp://

If you could take a look at that diagram and help me figure out the displacement relative to point A, after the person walked from point A to point B, that would be incredibly helpful.

I know I have to sort them out into components, but I'm not sure how.

Again, if you can help, thank you very much.

  • Vectors -

    If you want to look at the drawing, you have to remove the space between h and t in and add the letter 'o'.

    Thanks again, it would really help me.

  • Vectors -

    there is no protocol that starts with

    removing the space and going with the normal http://... gave me a "Not Found" message.

  • Vectors -

    I meant add the 'o' in .c om but it wouldn't let me post a URL.

    Sorry for the confusion.

  • Vectors -

    Ok, I got the page, but I am having difficulty reading some of the data.

    Especially the second vector running from the end of the 40 m horizontal at a 60º angle.
    We have to know how long it is.
    Suppose we call the end of that vector P.
    Then we could find the magnitude of vector(AB) using the cosine law, and then using the sine law we could find the angle that vector(AB) makes with the 60º angle and the 80 m vectors.
    Repeat the process by joining A to the top of the last vector and finding its magnitude and direction.
    One more cosine law will allow you to find │vector(AB)│

  • Vectors -

    The two labels on the right are 50 meters and 60 degrees.

    I'm really sorry, but I don't understand what you were trying to say.

    Can you please clarify?

  • Vectors -

    OK, first of all let's label some points.
    Let the end of the first vector from A be Q, let the end of the second vector be P and let the end of the third vector be R.
    From basic geometry and parallel lines we have
    angle AQP = 120º
    angle RPQ = 30º and
    RP makes a 60º angle with the vertical at R

    Look at triangleAPQ, by cosine law
    AP^2 = 40^2 + 50^@ - 2(40)(50)cos120º
    AP = 78.1025

    by sine law, sin APQ/40 = sin120/78.1025
    .angle APQ = 26.33, so angle RPA = 3.67º

    now look at triangle RPA, by cosine law

    RA^2 = 80^2 + 78.1025^2 - 2(80)(78.1025)cos3.67º
    RA = 5.406

    by sine law, sin PRA/78.1025 = sin3.67/5.406
    angle PRA = 67.63º

    Finally in triangle RAB
    angle BRA = 52.37º,....(180-60-67.63)

    AB^2 = 30^2 + 5.406^2 - 2 930)(5.406)cos52.37º

    AB = 27.04


  • Vectors -

    Thank you so so so so so much!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Geometry and Algebra

    AB is a diameter of a circle with centre O. P is on BA extended, and PT is tangent to the circle. Use the corollary to the Intersecting Secants Property to prove that PT is perpendicular to OT. Here is the diagram (Without the dashes …
  2. math

    Find an orthonormal basis for the subspace of R^3 consisting of all vectors(a, b, c) such that a+b+c = 0. The subspace is two-dimensional, so you can solve the problem by finding one vector that satisfies the equation and then by constructing …
  3. MATH

    i111. photobucket. com/ albums/ n152/ tamana_02/ Untitled. jpg Find the area of the shaded region.
  4. chemistry

    The blank questions are the ones I need help with. TIA img . photobucket .(c o m)/albums/v327/triads1/img030.jpg?
  5. biology

    h ttp://i726.photobucket. com/albums/ww263/fornss/b iology2.jpg?
  6. Math

    I'm doing a vector problem which involves two forces with an angle of 30 degrees between them acting on an object. I think that I should draw my vector diagram with the vectors coming out of the object while my friend thinks that the …
  7. Chemistry

    Could someone help out with the second question. Its about reagents. Click the link for the question. img*photobucket*com/albums/v712/DeadMan986/Q20-21*jpg All of the . are replaced with * in the link
  8. Chemistry

    I think the answer to this question is choice C, but im not sure. I have to find the product for this question. img*photobucket*com/albums/v712/DeadMan986/Q38*jpg The * in the link should be .
  9. Physics (vectors)

    Please help me with this question about vectors. Thanks. If you are given a graph with a vector starting at the point (1,-1)and the arrow goes to the point (0,-4). What is the vector in rectangular coordinate?
  10. Math And Science for Young Children

    The conventional problem-solving strategies usually taught have been: A. act out the problem, make a drawing or diagram, and solve the problem. B. look for a pattern, construct a table, solve the problem, and look back. C. understand …

More Similar Questions