# NEET Physics Mathematical Tools Questions Solved

Two vectors $\stackrel{\to }{\mathrm{A}}$ and $\stackrel{\to }{\mathrm{B}}$ lie in a plane. Another vector $\stackrel{\to }{\mathrm{C}}$ lies outside this plane. The resultant $\stackrel{\to }{\mathrm{A}}+\stackrel{\to }{\mathrm{B}}+\stackrel{\to }{\mathrm{C}}$ of these three vectors

(A)  can be zero

(B)  cannot be zero

(C)  lies in the plane of

(D)  lies in the plane of

Concept Videos :-

#20 | Vectors: Introduction
#22 | Vectors : Subtraction

Concept Questions :-

Resultant of Vectors

(B)

Using triangle law,

$\stackrel{\to }{\mathrm{A}}+\stackrel{\to }{\mathrm{B}}+\stackrel{\to }{\mathrm{R}}=0$

So $\stackrel{\to }{\mathrm{R}}$ has to lie in same plane as  otherwise we will not get zero resultant.

So, $\stackrel{\to }{\mathrm{A}}+\stackrel{\to }{\mathrm{B}}+\stackrel{\to }{\mathrm{C}}$ cannot be zero as C is out of plane

Difficulty Level:

• 19%
• 59%
• 12%
• 12%
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