physics

posted by .

what are vectors? and how do you us them. for example, i don't understand vector addition.

  • physics -

    A vector has both magnitude and direction. A good example is the difference between speed and velocity.
    You can measure speed with just a speedometer, but for velocity you need both the speedometer and a compass.
    When you add vectors you must take account of both their speeds and directions.
    One way is graphically using the sum as the diagonal of a parallelogram with the sides being the two vectors.
    Another way which is much more suited to computation is to find the components of both vectors in somme perpendicular axis system containing the vecors. That works because perpendicular vectors are "othogonal", changing a component in one of the axis directions does not affect the component on the other axis.
    Then components of the to vectors may be added on each axis and a resultant found from the results.
    In such a system the component of a vector along an axis is the magnitude of the vector times the cosine of the angle between vector and axis.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics [vectors]

    The concept i get, but somehow i just can't execute this problem, please help me! You are given vectors A = 5.5 6.2 and B = - 3.7 7.4 . A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product …
  2. 12th grade

    prove that normal to plane containing 3 points whose position vectors are a vector,b vector,c vectorlies in direction addition of cross product of vectors b and c and cross product of vectors c and a and cross product of vectors a …
  3. Vectors

    Two vectors, A and B, are added by means of vector addition to give a resultant vector R. The magnitudes of A and B are 9 m and 8 m, respectively, and they can have any orientation. What are the maximum and minimum possible values …
  4. URGENT - Vectors

    Two vectors, A and B, are added by means of vector addition to give a resultant vector R. The magnitudes of A and B are 9 m and 8 m, respectively, and they can have any orientation. What are the maximum and minimum possible values …
  5. Vectors

    Verify using an example that Vector a + (Vector b • Vector c) is not equal to (Vector a + Vector b) • (Vector a +Vector c). (This means that addition does not distribute over the dot product.) Explain the problem that arises.
  6. Vectors

    Use a specific example to prove that the cross product is also not associative. That is, use three specific vectors in 3-sapce to show that Vector a×(Vector b × Vector c) is not equal to (Vector a × Vector b) × Vector c.
  7. Vectors

    Verify using a specific example that (Vector a + Vector b) × (Vector a – Vector b) = 2(Vector b×Vector a). Expand to the general case to prove that the result is always true.
  8. Vectors

    Verify using an example that Vector a + (Vector b • Vector c) is not equal to (Vector a + Vector b) • (Vector a +Vector c). Explain the problem that arises
  9. math vectors

    Use a specific example to prove that the cross product is also not associative. That is, use three specific vectors in 3-space to show that Vector a×(Vector b × Vector c) is not equal to (Vector a × Vector b) × Vector c. Can you …
  10. Physics

    This is another question I had too and didn't understand as well. Vector Addition: Use the head to tail method to determine the resultant vector of the following velocity vectors. V1= 540m/s @66 degrees V2= 12m/s @182 degrees V3= 96m/s …

More Similar Questions