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NEED HELP QUICK (regarding weight and acceleration)

  1. Oct 3, 2008 #1
    1. The problem statement, all variables and given/known data
    Answer True, False, or Cannot tell to each of the five statements below.
    E.g., if the answer to the first statement is `true' and to the rest, `cannot tell', enter TCCCC.

    A)You pour 100 g of salt onto a spring scale in an elevator accelerating upward. The scale reads a value greater than 100 g.

    B)A 2 kg and a 3 kg ball are dropped from a tower. The net forces on each are the same.

    C)Mass and weight describe the same thing, although in different units.

    D)You are standing on a jet-powered platform that can move straight up or down. Your apparent weight is greater than your true weight if the platform is descending and speeding up.

    E)An astronaut stands on a bathroom scale on the surface of Jupiter; the scale does not read his true weight.


    2. Relevant equations



    3. The attempt at a solution
    I have tried attempted many solutions (13 out of 15 tries used up). I am fairly sure that B), C), and D) are false. Quick help would be appreciated, time is running short.
     
  2. jcsd
  3. Oct 3, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What about the ones you're not sure about? What's your reasoning on those?
     
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