SATHEE: Kinematics Question 137

Kinematics Question 137

Question: A vector is represented by $3 \hat{i} + \hat{j} + 2 \hat{k}$ . it’s length in XY plane is [EAMCET (Engg.) 1994]

Options:

A) 2

B) $\sqrt{14}$

C) $\sqrt{10}$

D) $\sqrt{5}$

Show Answer

Answer:

Correct Answer: C

Solution:

$\vec{R} = 3 \hat{i} + \hat{j} + 2 \hat{k}$

Length in XY plane = $\sqrt{R_{x}^{2} + R_{y}^{2}} = \sqrt{3^{2} + 1^{2}}$

$= \sqrt{10}$

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Kinematics Question 137

Question: A vector is represented by 3i^+j^+2k^ . it’s length in XY plane is [EAMCET (Engg.) 1994]

Options:

Answer:

Solution:

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Question: A vector is represented by $3 \hat{i} + \hat{j} + 2 \hat{k}$ . it’s length in XY plane is [EAMCET (Engg.) 1994]