Home
Class 11
PHYSICS
The vector vecA and vecB are such that |...

The vector `vecA` and `vecB` are such that `|vecA+vecB|=|vecA-vecB|`. The angle between vectors `vecA` and `vecB` is -

A

`90^(@)`

B

`60^(@)`

C

`75^(@)`

D

`45^(@)`

Text Solution

Verified by Experts

The correct Answer is:
1
`|vecA+ vecB|^(2) = |vecA- vecB|^(2)`
`rArr A^(2) + B^(2) + 2AB cos theta = A^(2) + B^(2) - 2AB cos theta `
`rArr cos theta = 0 rArr theta = 90^(@)`
Promotional Banner

Topper's Solved these Questions

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN |Exercise EXERCISE-III CHECK YOUR UNDERSTANDING|15 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN |Exercise EXERCISE-IV ASSERTION & REASON|11 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN |Exercise CROSS PRODUCT|15 Videos

  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-V B|19 Videos

Similar Questions

Explore conceptually related problems

Two vectors vecA and vecB are such that vecA+vecB=vecA-vecB . Then

if| vecAxxvecB|=|vecA.vecB| , then angle between vecA and vecB will be

If |vecAxxvecB|=vecA*vecB , then angle between vecA and vecB" is "theta = …...

If vectors vecA and vecB are such that |vecA+vecB|= |vecA|= |vecB| then |vecA-vecB| may be equated to

If vectors vecA and vecB are such that |vecA+vecB|= |vecA|= |vecB| then |vecA-vecB| may be equated to

If vecA+ vecB = vecC and A+B=C , then the angle between vecA and vecB is :

The angle between vectors (vecA xx vecB) and (vecB xx vecA) is :

If vecA+ vecB = vecC and A+B+C=0 , then the angle between vecA and vecB is :

When vecA.vecB=-|vecA||vecB| , then :-

If |vecAxxvecB|=AB , then angle between vecA and vecB will be zero.