Vectors Question 101
Question: A vector is represented by $ 3,\hat{i}+\hat{j}+2,\hat{k} $ . Its length in XY plane is
[EAMCET (Engg.) 1994]
Options:
A) 2
B) $ \sqrt{14} $
C) $ \sqrt{10} $
D) $ \sqrt{5} $
Correct Answer: C $ \vec{R}=3\hat{i}+\hat{j}+2\hat{k} $ \ Length in XY plane = $ \sqrt{R_x^{2}+R_y^{2}}=\sqrt{3^{2}+1^{2}} $ $ =\sqrt{10} $
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Answer:
Solution:
BETA
