Q.
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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a
both a & b
b
both b & c
c
a, b & c
d
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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