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Physics
Which one of the following pair cannot be the rectangular components of force vector of 10 N ?
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Q. Which one of the following pair cannot be the rectangular components of force vector of $10\, N$ ?
Motion in a Plane
A
$6\, N \,\& \,8\, N$
28%
B
$7\, N \,\& \sqrt{51} N$
26%
C
$6 \sqrt{2} N \& 2 \sqrt{7} N$
15%
D
$9\, N \& 1\, N$
31%
Solution:
The vector magnitude $=\sqrt{A_{x^{2}}+A_{y^{2}}}$
Vector magnitude $=10$
But (4) option gives the magnitude
$\Rightarrow \sqrt{9^{2}+1^{2}}=\sqrt{82} \neq 10$
[by trial method check options]