Which of the following is a null vectora) velocity vector of a body moving in a circle with a uniform speedb) velocity vector of a body moving in a straight line with a uniform speedc) position vector of the origin of the rectangular coordinate systemd) displacement vector of a stationary object

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both a & b

both b & c

a, b & c

both c & d

answer is D.

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Detailed Solution

A null vector has zero magnitude and no specified direction.So option -(4) is correct

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