Kinematics Question 438
Question: If a unit vector is represented by $ 0.5\hat{i}+0.8\hat{j}+c\hat{k}, $ then the value of c is
Options:
A) 1
B) $ \sqrt{0.11} $
C) $ \sqrt{0.01} $
D) $ \sqrt{0.39} $
Correct Answer: B [b] $ \sqrt{{{(0.5)}^{2}}+{{(0.8)}^{2}}+{{(c)}^{2}}}=1 $
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Answer:
Solution:
$ \therefore $ $ c^{2}=0.11 $ or $ c=\sqrt{0.11} $
