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Homework Help: Simple true and false questions please help

  1. May 3, 2010 #1
    1. The problem statement, all variables and given/known data

    true or false


    If there is no work there is no kinetic energy.

    There has to be a change in velocity for there to be a change in kinetic energy.

    when workiong with gravity, the difference in heights is important, the position above the earth is not.

    the sum of the kinetic energy and total energy is the total work.


    2. Relevant equations



    3. The attempt at a solution

    1.) false
    2.)true
    3.)false

    not sure on these please help
     
  2. jcsd
  3. May 3, 2010 #2

    rock.freak667

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    Homework Helper

    You have 4 statements and 3 answers. For the gravity one, why do you think the position above the Earth is relevant?
     
  4. May 4, 2010 #3
    kinetic energy formula has another variable than the velocity and the problem does not set it as constant so....
     
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