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Question

What is a vector in physics?


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Solution

  1. Vector is a physical quantity that has both magnitude and direction.
  2. A vector with a value of magnitude equal to one is called a unit vector.
  3. Examples are linear momentum, Acceleration, Displacement, Momentum, Angular velocity and force, etc.
  4. The vectors between two points A and B is given as in fig. ABor vector a.
  5. In fig., the arrow over the head of the vector shows the direction of the vector.
  6. A unit vector is the direction vector,
  7. Unit vector can be calculated by
    unitvector=vectormagnitudevectorA^=AA

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