Kinematics Question 437

Question: If two vectors $ 2\hat{i}+3\hat{j}+\hat{k} $ and $ -4\hat{i}-6\hat{j}-\lambda \hat{k} $ are parallel to each other, then value of $ \lambda $ it’s

Options:

A) 0

B) 2

C) 3

D) 4

Show Answer

Answer:

Correct Answer: B

Solution:

[b] The coefficient of $ \hat{i},\hat{j} $

and $ \hat{k} $ should bear a constant ratio.

or $ \frac{2}{-4}=\frac{3}{-6}=\frac{1}{-\lambda } $ .



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