SATHEE: Kinematics Question 446

Kinematics Question 446

Question: Given $\vec{A} = \hat{i} + \hat{j} + \hat{k}$ and $\vec{B} = - \hat{i} - \hat{j} - \hat{k}, (\vec{A} - \vec{B})$ will make angle with $\vec{A}$ as

Options:

A) $0^{\circ}$

B) $180^{o}$

C) $90^{\circ}$

D) $60^{\circ}$

Show Answer

Answer:

Correct Answer: A

Solution:

[a] $\vec{A} - \vec{B} = 2 \hat{i} + 2 \hat{j} + 2 \hat{k} = 2 \vec{A}$

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