Recent content by kingkong69

  1. K

    Undergrad Finding a basis for the following vectors.

    Find a basis and the dimension for the subspace of R^3(3D) spanned by the vectors {(0,1,-2),(3,0,1),(3,2,-3)} The dimension is 2 regardless if i put the vectors in row space or column space form. But to find the basis I need to put it in row space form. Can anyone please explain when I...
  2. K

    Undergrad Show that two polynomials cannot span P2.

    Hi thanks i get u. i have a question for you. when I am given a set of vectors, i am asked to find a basis for it. I solve it to Reduced row echolon form and get the basis. But sometimes i have to write the vectors in columns, sometimes in rows for the matrice. Sorry for being unclear Do i...
  3. K

    Undergrad Finding the basis for a set of vectors.

    The set is (1,3),(-1,2),(7,6) it is in R2 so I don't get why there are 3 elements. I assumed they are not vectors but points instead. but if they are points then it becomes a line, and the answer is that its dimension is 2, and a basis is (1,0) and (0,1) Could someone explain this? Thanks
  4. K

    Undergrad Show that two polynomials cannot span P2.

    Hi I know the dimension is 3, two polynomials has dimension 2 only so it cannot span P2. How would I go about showing it if I were to write it down mathematically? Thanks
  5. K

    Undergrad Find Area of Triangle (-1 2 -1 2), (-1 2 -1 1) & (2 -1 2 2)

    wat semantics?
  6. K

    Undergrad Find Area of Triangle (-1 2 -1 2), (-1 2 -1 1) & (2 -1 2 2)

    haha ye I am confused i was working through maplesoft, http://img696.imageshack.us/img696/9376/123123123ii.jpg
  7. K

    Undergrad Find Area of Triangle (-1 2 -1 2), (-1 2 -1 1) & (2 -1 2 2)

    find the area of the triangle with vertices (-1 2 -1 2) (-1 2 -1 1) and (2 -1 2 2) its 4 d Im confused thanks in advance
  8. K

    Finding the moment of inertia of a uniform square lamina

    hey sorry didnt answer you do you want me to explain it or you ok with it?
  9. K

    Finding the moment of inertia of a uniform square lamina

    Alright I found it! Thanks a ton again!
  10. K

    Finding the moment of inertia of a uniform square lamina

    Hi tiny-tim! Thanks for pointed my mistake out, is the rest correct?
  11. K

    Finding the moment of inertia of a uniform square lamina

    http://img20.imageshack.us/img20/9443/ssssnm.png parallel and perpendicular axis theorem for moment of inertias So i solved the Moment of inertia for the large square through the perpendicular axis through a, (1/3)*M*(l^2), where l is 4a/2=2a, using the perpendicular theorem, Ixx+Iyy=Izz, we...
  12. K

    Moment of inertia of a wire shaped into a semi circle

    Find the moment of inertia of a wire, AB, of mass M and length pi*a, which is bent into a semicircle, about AB. Mr^2/b] [b]The mass of the wire is M=pi*a*m, where m is the mass per unit length of the rod. Then a small element, ds is regarded, of the circumference of the semicircle as being...
  13. K

    Simple Harmonic Motion , finding the time taken to travel an angular dispalcemnt

    got it, thanks a lot guys
  14. K

    Simple Harmonic Motion , finding the time taken to travel an angular dispalcemnt

    1. Homework Statement Find the time taken to reach half the maximum angular displacement in a PENDULUM. Given that the bob hanging at rest was given an initial velocity of 2ms, and the length of the string is 6m. 2. Homework Equations finding the angular velocity using sqrt.(g/l)...
  15. K

    Circular motion, oscillatory motion, SHM in springs

    Hey there, [SIZE="5"]The Question Points A,B,C,D, and E lie in a straight line. AB=BC=15 cm, CD=10 cm and DE=20 cm. A particle is moving with SHM so that A and E are the extreme positions of its motion. The period of the motion is 0.2s. Find the time the particle takes to get from B to D i)...