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Work done when a force F=(hati + 2hat(j...

Work done when a force `F=(hati + 2hat(j) + 3hatk) N` acting on a particle takes it from the point
`r_(1) =(hati + hatk)` the point `r_(2) =(hati -hatj + 2hatk)` is .

A

`3 J`

B

`1J`

C

`zero`

D

`2J`

Text Solution

Verified by Experts

The correct Answer is:
B
`W =F.S =F.(r_(f)-r_(i))`.
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DC PANDEY-WORK, ENERGY & POWER-Level 1 Objective
  1. The total work done on a particle is equal to the change in its kineti...

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  2. Work done by force of static friction .

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  3. Work done when a force F=(hati + 2hat(j) + 3hatk) N acting on a parti...

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  4. A particle moves along the x-axis from x=0 to x=5m under the influence...

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  5. A particle moves with a velocity v=(5hati-3hatj + 6hatk) ms^(-1) under...

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  6. A pump is required to lift 800 kg of water per minute from a 10 m deep...

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  7. A ball is dropped onto a floor from a height of 10 m. If 20% of its in...

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  8. A body with mass 1kg moves in one direction in the presence of a force...

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  9. A body has kinetic energy E when projected at angle of projection for ...

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  10. A person pulls a bucket of water from a well of depth h. if the mass ...

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  11. The velocity of a particle decreases uniformly from 20 ms^(-1) to zero...

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  12. The minimum stopping distance of a car moving with velocity u is x. If...

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  13. A projectile is fired from the origin with a velocity v(0) at an angle...

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  14. A particle of mass m moves from rest under the action of a constant f...

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  15. A body moves under the action of a constant force along a straight lin...

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  16. A ball is dropped at t=0 from a height on a elastic surface. Identify ...

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  17. A block of mass 5 kg is raised from the bottom of the lake to a height...

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  18. A bode mass m is projected at an angle theta with the horizontal with...

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  19. A spring of force constant k is cut in two parts at its one-third ling...

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  20. A particle moves under the action of a force F=20hati + 15hatj along a...

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