SATHEE: Kinematics Question 429

Kinematics Question 429

Question: It’s found that $| A + B | = | A |$ . this necessarily implies.

Options:

A) $B = 0$

B) $\vec{A}, \vec{B}$ antiparallel

C) $\vec{A}, \vec{B}$ are perpendicular

D) $\vec{A} . \vec{B} \leq 0$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $(\vec{A} + \vec{B}) . (\vec{A} + \vec{B}) = \vec{A} . \vec{A}$
$\Rightarrow$ $A^{2} + B^{2} + 2 \vec{A} . \vec{B} = A^{2}$
$\Rightarrow$ $2 \vec{A} . \vec{B} = - B^{2}$

Kinematics Question 429

Question: It’s found that $| A + B | = | A |$ . this necessarily implies.

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 429

Question: It’s found that |A+B|=|A| . this necessarily implies.

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: It’s found that $| A + B | = | A |$ . this necessarily implies.