Class 11 Physics Motion In A Plane Triangle Method

Addition and Subtraction of Vectors – Triangle Method

The method of adding vectors graphically is by arranging them so that head of first is touching the tail of second vector and making a triangle by joining the open sides. This method is called head-to-tail method or triangle method of vector addition

  • Vector addition is:
    • Commutative: A + B = B + A
    • Associative: (A + B) + C = A + (B+ C)
  • Adding two vectors with equal magnitudes and opposite directions results in null vector.
    • Null Vector: A + (-A) = 0
  • Subtraction is adding a negative vector(opposite direction) to a positive vector.
    • AB = A + (-B)

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