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Under the effect of a force vecF=5hati-2...

Under the effect of a force `vecF=5hati-2 hatj+3hatk`N, abody of mass 1 kg is displaced from position `5hati+4hatj-2hatk` to position `8hati-hatj-hat4k`. Calculate the work done .

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MODERN PUBLICATION-MOTION IN A PLANE -Revision Exercises (Numerical Problems)
  1. A man rides a jet boat with a speed of 40 km//hr in the north -east di...

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  2. For the vector vecA=a hati+2hatj-hatj and vecB =2ahati-ahatj+4hatk to ...

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  3. Under the effect of a force vecF=5hati-2 hatj+3hatkN, abody of mass 1 ...

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  4. For three vectors , vecX, vecY and vecZ, vecZ=vecX+vecY and |vecX|=12,...

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  5. The resultant of vectors vecA=3hati+4hatj+5hatk and vecB =5hati+3 hatj...

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  6. For vectors vecA=3hati-4hatj+5hatk and vecB=hati-hatj-hatk, calculate ...

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  7. Determine the value of alpha for which the vectors i-3alphahatj+hatk a...

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  8. Determine a unit vector perpendicular to both the vectors vecA=2hati-3...

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  9. The magnitude of two vectors vecA and vecB is 3 and 4 respectively . ...

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  10. Find the area of the triangle determined by two vectors: vecA=hati-3ha...

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  11. The diagonals of a parallelogram are given by -3hati+2hatj-4hatk and -...

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  12. The position vector of a particle is given by vecr=(2 sin 2t)hati+(3+ ...

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  13. From the top of a hill 480 m high , a projectile is fired horizontally...

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  14. A body is projected horizontally with a velocity of 39.4m//s from the ...

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  15. Two hills of height 100 m and 80 m have a valley of breadth 15 between...

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  16. A particle is projected with a velocity of 25 m//s at an angle of 30^...

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  17. Find the angle of projection of a projectile for which the horizontal ...

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  18. A batman hits a cricket ball with a speed of 25 m//s at a projection a...

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  19. From the top of a cliff of height 150 m, a stone is thrown up with a ...

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  20. Calculate the angular speed of againt wheel of radius 10 m, moving wi...

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