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If vecA=3hati-4hatj and vecB=-hati-4hatj...

If `vecA=3hati-4hatj` and `vecB=-hati-4hatj`, calculate the direction of `vecA-vecB`.

A

along positive x-axis

B

along negative x-axis

C

along positive y-axis

D

along negative y-axis

Text Solution

Verified by Experts

The correct Answer is:
A
`vecA-vecB=4hati`
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Knowledge Check

  • If vecA=3hati-4hatj and hatB=-hati-4hatj , calculate the direction of vecA+vecB

    A
    `tan^(-1)(4)` with positive X-axis in close wise
    B
    `tan^(-1)(4)` with X-axis in clock wise
    C
    `tan^(-1)(4)` with positive X-axis in anticlock wise
    D
    `tan^(-1)(4)` with negative X-axis in anticlock wise

  • If vecA=4hati-3hatj and vecB=6hati+8hatj then magnitude and direction of vecA+vecB will be

    A
    `5, tan^(-1)(3//4)`
    B
    `5sqrt(5),tan^(-1)(1//2)`
    C
    `10,tan^(-1)(5)`
    D
    `25, tan^(-1)(3//4)`

  • If vecA=4hati+6hatj and vecB=2hati+3hatj . Then

    A
    `vecA.vecB=29`
    B
    `vecAxxvecB=vec0`
    C
    `(|vecB|)/(|vecA|)=2/1`
    D
    angle between `vecA` and `vecB` is `30^@`
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