Vectors Questions and Answers - Form 2 Topical Mathematics

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Questions

  1. If OA = 12i + 8j and OB = 16i + 4j. Find the coordinates of the point which divides AB
    internally in the ratio 1:3
  2. Find scalars m and n such that
    m(43) + n(-32) = (58)
  3. In a triangle OAB, M and N are points on OA and OB respectively, such that OM: MA = 2:3 and ON: NB = 2:1. AN and BM intersect at X. Given that OA = a and OB = b.
    vectors 3q
    1. Express in terms of a and b
      1. BM
      2. AN
    2. By taking BX = t and AX = hAN, where t and h are scalars, express OX in two different ways
    3. Find the values of the scalars t and h
    4. Determine the ratios in which X divides :-
      1. BM
      2. AN
  4. OABC is a parallelogram, M is the mid-point of OA and AX = 2/7AC, OA=a and OC = c.
    vectors 4q
    1. Express the following in terms of a and c
      1. MA
      2. AB
      3. AC
      4. AX
    2. Using triangle MAX, express MX in terms of a and c
    3. The co-ordinates of A and B are (1, 6, 8) and (3, 0, 4) respectively. If O is the origin and P the midpoint of AB. Find;
      1. Length of OP
      2. How far are the midpoints of OA and OB?
  5.  
    1. If A, B & C are the points (2, - 4), (4, 0) and (1, 6) respectively, use the vector method to find the coordinates of point D given that ABCD is a parallelogram.
    2. The position vectors of points P and Q are p and q respectively. R is another point with position vector r = 3/2q - ½p. Express in terms of p and q
      1. PR
      2. PQ, hence show that P, Q & R are collinear.
      3. Determine the ratio PQ : QR
  6. The figure shows a triangle of vectors in which OS: SP = 1:3, PR:RQ = 2:1 and T is the midpoint of OR.
    vectors 6q
    1. Given that OP = p and OQ = q, express the following vectors in terms of P and q
      1. OR
      2. QT
    2. Express TS in terms of p and q and hence show that the points Q, T and S are collinear.
    3. M is a point on OQ such that OM = KOQ and PTM is a straight line. Given that
      PT: TM = 5:1, find the value of k
  7. Given that a = (-32), b = (4-6) and c = (5-10) and that p = 3a – ½b +1/10c
    Express p as a column vector and hence calculate its magnitude /P/ correct to two decimal places
  8. In a triangle OAB, M and N are points on OA and OB respectively, such that OM:MA= 2:3 and ON:NB= 2:1. AN and BM intersect at X. Given that OA = a and OB = b
    1. Express in terms of a and b:-
      1. BM
      2. AN
    2. Taking BX = kBM and AX =hAN where k and h are constants express OX in terms of
      1. a, b and k only
      2. a, b, and h only
    3. Use the expressions in (b) above to find values of k and h
  9. In the figure below OAB is a triangle in which M divides OA in the ratio 2:3 and N divides OB in the ratio 4:1. AN and BM intersects at X.
    vectors 9q
    1. Given that OA = a and OB = b, express in terms of a and b
      1. AN
      2. BM
      3. AB
    2. If AX = sAN and BX = tBM, where s and t are constants, write two expressions for OX in terms of a, b, s and t. Find the value of s and t hence write OX in terms of a and b
  10. Given that:- r = 5i – 2j and m = -2i + 6jk are the position vectors for R and M respectively. Find the length of vector RM.
  11. OABC is a trapezium in which OA = a and AB = b. AB is parallel to OC with 2AB = OC.
    T is a point on OC produced so that OC: CT = 2:1. AT and BC intersect at X so that BX = hBC and AX = KAT
    vectors 11q
    1. Express the following in terms of a and b:-
      1. OB
      2. BC
    2. Express CX in terms of a, b and h
    3. Express CX in terms of a, b and k
    4. Hence calculate the values of h and k
  12. Given that a = 2i + j – 2k and b = -3i + 4jk find :-
    | a + b|.
  13. In the figure below, E is the mid-point of BC. AD:DC=3:2 and F is the meeting point of
    BD and AE. If AB = b and AC = c;
    vectors 15q
    1. Express BD and AE in terms of b and c
    2. If BF =tBD and AF =nAE, find the values of t and n
    3. State the ratios in which F divides BD and AE
  14. The coordinates of point O, A, B and C are (0, 0) (3, 4) (11, 6) and (8, 2) respectively.
    A point P is such that the vector OP, BA, BC satisfy the vector equation OP = BA + ½ BC. Find the coordinates of P.
  15. A point Q divides AB in the ratio 7:2. Given that A is (-3, 4) and B(2, -1).
    Find the co-ordinates of Q

Answers


  1. vectors 1a

  2. vectors 2a
  3.  
    vectors 3a

  4. vectors 4a

  5. vectors 5a

  6. vectors 6a

  7. vectors 7a

  8. vectors 8a

  9. vectors 9a

  10. vectors 10a

  11. vectors 11a

  12.  vectors 12a

  13. vectors 13a

  14. vectors 14a

  15. vectors 15a
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