1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Physics Lab / Equation manipulation

  1. Apr 8, 2015 #1
    1. T^2 = (4 pi^2 m)/k * d^2 + (4 pi^2 I)/k
    y = m * x + c
    (4 pi^2 m)/k = m (gradient)
    (4 pi^2 I)/k = c (the y intercept )
    A graph of T^2 vs d^2 was plotted.
    (^2) means squared
    Find constants k and I
    How is this done since the m in the formula is unknown ?

    "Oscillation of a metre rule" is the the tiltle of the lab
  2. jcsd
  3. Apr 8, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    It looks like you have 'm' serving two different roles.

    The 'm' I highlighted in red above appears to be the mass of something. Presumably you measured it.

    The other m, should be the slope (gradient) of the data you graphed, which hopefully fell along some line. This m together with c, should allow you to determine I and k, but you will need to know m .
  4. Apr 8, 2015 #3
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted