Velocity of a stationary object, acceleration of an object moving with uniform velocity and resultant of two equal and opposite vectors are the examples of null vector. (iii) Zero Vector or Null Vector A vector whose magnitude is zero is known as a zero or null vector. What is zero vector give one physical example of zero vector? It behaves essentially like the number 0. We denote the zero vector with a boldface 0, or if we can’t do boldface, with an arrow →0. With no length, the zero vector is not pointing in any particular direction, so it has an undefined direction. Yes, there are physical quantities like electric current and pressure which have magnitudes and directions, but are not considered as vectors because they do not follow vector laws of addition. Can we have physical quantities having magnitude and direction which are not vector? This vector has zero components along a line lying along the Y-axis and a nonzero component along the X-axis. Yes, a vector can have zero components along a line and still have a nonzero magnitude. Therefore, it has no specified direction or we can say an undefined direction. What is a zero vector explain the need of a zero vector?Īnswer:- It is defined as a vector that has zero length or no length and with no length, it is not pointing to any particular direction. (ii) If a particle is at rest then displacement of the particle is zero vector. Examples: (i) Position vector of origin is zero vector. When the magnitude of a vector is zero, it is known as a zero vector. The zero vector (as a column in Γl or Γr) is called the zero complex, and simply denoted by 0. Though the direction of the zero vector is indeterminate, even if you assign a direction to it, it will have no effect physically as it has zero magnitudes. It is the resultant of two or more equal vectors that are acting opposite to each other.ĭoes the phrase direction of zero vector have a physical significance?Īnswer: The phrase “direction of zero vector” does not have physical significance. What is null vector give the physical meaning of null vector?Ī null vector is a vector that has magnitude equal to zero and is directionless.
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