Science

a)How much work is required to lift a 35-kg object from the ground 3.0 m into the air?

b) How much gravitational potential energy did this object gain?

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asked by Annie
  1. 35 * g = weight
    weight * distance raised = work in

    which is exactly the increase in potential energy

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    posted by Damon
  2. So 35 x 9.8 = 343 N

    343 x 3.0 = 1029 J

    Is that the answer to A or B, I'm a bit confused

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    posted by Annie
  3. yes.

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    posted by DrBob222
  4. or yes, yes :)

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    posted by Damon
  5. yes as in for A) or yes as in for B) o_O

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    posted by Apesetic
  6. That's what I'm thinking..

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    posted by Annie
  7. Just for clarity; yes for A and yes for B.

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    posted by DrBob222
  8. 343 N for A and 1029 J for B

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    posted by Higming
  9. 343 N for B and 1029 J for A

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    posted by Higming
  10. cxzx

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    posted by xcxz
  11. But where did you guys get the 9.8 from?

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    posted by Student
  12. Fg=M x g Is that right cause i am doing a test
    =35 kg x 9.8N
    =343N

    343 x 3.0=1029J

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    posted by Student
  13. Not right now but it is on a review sheet for the test and the test is tomorrow

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    posted by Student
  14. So does a)343N and b)1029J
    ?????????????????????????????????????????????????????????????

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  15. I figured it out thx for the help u guys

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