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A particle acted by constant forces 4 ha...

A particle acted by constant forces `4 hat i+ hat j-3 hat k` and `3 hat i+ hat9- hat k` is displaced from point ` hat i+2 hat j+3 hat k` to point `5 hat i+4 hat j+ hat k`. Find the total work done by the forces in units.

A

50 units

B

20 units

C

30 units

D

40 units

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The correct Answer is:
D
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MOTION-VECTOR -EXERCISE - 4 ( LEVEL -I)
  1. The sine of the angle between vectors vec(a)=2hat(i)-6hat(j)-3hat(k) a...

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  2. if vecu=hati+hatj , vecv=hati-hatj and vecw=hati+2hatj+3hatk.if vecnis...

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  3. A particle acted by constant forces 4 hat i+ hat j-3 hat k and 3 hat i...

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  4. If the vector vec(AB) = 3hat(i) + 4hat(k) and vec(AC) = 5hat(i) - 2hat...

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  5. The vectors vec(a),vec(b),vec (c ) are such that vec(a) + vec(b) + ve...

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  6. Consider points A, B, C and D with position vectors 7hat(i) - 4hat(j)...

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  7. If vec u , vec va n d vec w are three non-cop0lanar vectors, then ...

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  8. If veca, vecb,vecc are non-coplanar vectors and lambda is a real numbe...

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  9. Let vec u , vec va n d vec w be such that | vec u|=1,| vec v|=2a n d|...

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  10. For any vector vec(a) |vec(a)xx hat(i)|^(2)+ |vec(a)xx hat(j)|^(2)+ |h...

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  11. If C is the mid-point of AB and P is any point outside AB, then

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  12. If veca,vecb,vecc are non-coplanar vectors and lambda is a real number...

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  13. If (vecaxxvecb)xxvecc=vecaxx(vecbxxvecc), Where veca, vecb and vecc a...

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  14. ABC is triangle, right angled at A. The resultant of the forces acting...

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  15. The values of a for which the points A, B, and C with position vectors...

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  16. If vec(u) and vec(v) are unit vectors and theta is the actue angle...

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  17. Let vec(a) = hat(i) + hat(j) + hat(k), vec(b) = hat(i) - hat(j) + 2hat...

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  18. The non-zero vectors are vec a,vec b and vec c are related by vec a= ...

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  19. The vector vec a=""alpha hat i+2 hat j+""beta hat k lies in the pl...

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  20. If vec u ,"" vec v , vec w are noncoplanar vectors and p, q are re...

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