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Kanika Charandeep Gera
Asked: 2022-11-09T17:36:41+05:30 In:

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-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)`
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  1. Correct Answer – B
    (b)` A+B =10hati +5hatj`
    `therefore|A+B|=sqrt((10^(2)+(5)^(2))=5sqrt(5)`
    Angle of (A+B) with Xasis ,`theta=tan^(-1)((5)/(10))=tan^(-1)((1)/(2))`

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Kalyani Kalita
Asked: 2022-11-02T06:17:01+05:30 In:

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-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)`
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  1. Correct Answer – B

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Megha Konda
Asked: 2022-10-31T07:03:51+05:30 In:

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-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)`
Parabola
Leave an answer

Leave an answer

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1 Answer

  1. Correct Answer – B
    (b) `A+B=10hati+5hatj`
    ` therefore |A+B|=sqrt(100+25)=5sqrt(5)`
    Angle of A.B with X-axis,
    `theta=tan^(-1)((5)/(10))=tan^(-1)((1)/(2))`

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