Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook