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A force vecF=(4hati+5hatj)N acts on a pa...

A force `vecF=(4hati+5hatj)N` acts on a particle moving in XY plane. Starting from origin, the particle first goes along x-axis to the point `(5.0)` m and then parallel to the Y-axis to the point `(5,4` m. The total work done by the force on the particle is

A

`+12J`

B

`-6J`

C

`+24J`

D

`-12J`

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The correct Answer is:
C
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AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - B)
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  3. A chain is held on a frictionless table with 1//n th of its length han...

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  4. A bullet of mass 20 g leaves a riffle at an initial speed 100 m/s and ...

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  5. A stone with weight W is thrown vertically upward into the air with in...

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  6. Figure shows the variation of a force F acting on a particle along x-a...

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  7. A spring of force constant K is first stretched by distance a from its...

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  8. A knife of mass m is at a height x from a large wooden block. The knif...

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  9. A man who is running has half the kinetic energy of a boy of half his ...

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  10. A particle of mass m moves with a variable velocity v, which changes w...

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  11. A particle is moving in a circular path of radius r under the action o...

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  12. The kinetic energy K of a particle moving along x - axis varies with i...

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  13. A block of mass sqrt2 kg is released from the top of an inclined smoot...

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  14. In net force on a system is zero then

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  15. Internal forces acting within a system of particles can alter

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  16. In the figure shown, a particle is released from the position A on a s...

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  17. A particle of mass m is projected at an angle alpha to the horizontal ...

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  18. A shell at rest on a smootyh horizontal surface explodes into two frag...

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  19. A particle is moving along a vertical circle of radius R. At P, what w...

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  20. A particle of mass m attached to the end of string of length l is rele...

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