SATHEE: Kinematics Question 149

Kinematics Question 149

Question: The angle between the two vectors $\vec{A} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ and $\vec{B} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ it’s [DPMT 2000]

Options:

A) 60°

B) Zero

C) 90°

D) None of these

Show Answer

Answer:

Correct Answer: D

Solution:

$\cos θ = \frac{\vec{A} . \vec{B}}{| A | | B |} = \frac{9 + 16 + 25}{\sqrt{9 + 16 + 25} \sqrt{9 + 16 + 25}}$ = $\frac{50}{50} = 1$
therefore $\cos θ = 1$
$∴$ $θ = \cos^{- 1} (1)$

Kinematics Question 149

Question: The angle between the two vectors $\vec{A} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ and $\vec{B} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ it’s [DPMT 2000]

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Kinematics Question 149

Question: The angle between the two vectors A→=3i^+4j^+5k^ and B→=3i^+4j^+5k^ it’s [DPMT 2000]

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: The angle between the two vectors $\vec{A} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ and $\vec{B} = 3 \hat{i} + 4 \hat{j} + 5 \hat{k}$ it’s [DPMT 2000]