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Refer to figure Find a the magnitude, b ...

Refer to figure Find a the magnitude, b x and y components and c. the angle with the X-axis of the resultant of `vec(OA), vec(BC) and vec(DE)`.
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The correct Answer is:
A, B, C, D
x component of `vec(OA)=2 cos 30^@=sqrt(3)`
x component of `vec(BC)=1.5 cos 120^@` =- 1.5/2=-0.75)
x compon ent of `vec(DE)=1 cos 270^@`= `1xx0=0`,
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HC VERMA-PHYSICS AND MATHEMATICS-Exercises
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  2. Let veca=4veci+3vecj and vecb=3veci+4vecj. a.Find the magnitudes of a....

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  3. Refer to figure Find a the magnitude, b x and y components and c. the ...

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  4. Two vectors have magnitudes 3 unit and 4 unit respectively. What shoul...

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  5. A spy report about a suspected car reads as follows. The car moved 2.0...

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  6. A carrom board 4ftxx4ft square) has the queen at the centre. The queen...

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  7. A mosquito net over a 7ftxx4ft bed is 3 ft high. The net hs a hole at ...

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  8. Suppose veca is a vector of magnitude 4.5 unit due north. What is the ...

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  9. Two vectors have magnitudes 2 m and 3m. The angle between them is 60^0...

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  10. Let A1 A2 A3 A4 A5 A6 A1 be a regular hexagon. Write the x-components ...

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  11. Let veca=2veci+3vecj+4veck and vecb=3veci+4vecj+5veck. Find the angle ...

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  12. Prove that vecA.(vecAxxvecB)=0

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  13. If vecA=2veci+3vecj+4veck and vecB=4veci+3vecj+2veck, find vecAxxvecB.

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  14. If vecA,vecB,vecC are mutually perpendicular show that vecCxx(vecAxxve...

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  15. A particle moves on a given straight line with a constant speed v. At ...

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  16. The force on as charged particle due to electric and magnetic fields i...

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  17. Give an example for which vecA.vecB=vecC.vecB but vecA!=vecC.

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  18. A curve is represented by y=sinx. If x is changed from pi/3 to pi/3+pi...

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  19. The electric curren in a charging R-C circuit is given by i=i0e^(-t/RC...

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  20. The electric current in a discharging R-C circuit is given by i=i0e^(-...

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