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: Acceleration due to Gravity

  1. Feb 18, 2009 #1
    1. The problem statement, all variables and given/known data
    Hi, I'm new here, and this may be a stupid question, but please bear with me. In my school, we had a lab where we measured the free fall acceleration. First we dropped a ball off a certain height and timed how long it took to reach the bottom. Then we used the equation:

    y = v1t + 1/2a(t^2)

    Note: v1 = 0 because we just dropped it, its initial velocity was 0. Also, the acceleration is "g". So the equation became:

    y = 1/2g(t^2)

    So we graphed y vs (t^2) and used the slope to find the value of "g".

    My question is, using the information I told you, is it possible to find the mass of the object? If so, how?

    I'm thanking you for your help in advance!
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    What i thought of doing was somehow calculating the value of the force of gravity and then use the formula:

    F = m * g

    and then just solve for m, but i dont know how that is applicable here.
    Last edited: Feb 18, 2009
  2. jcsd
  3. Feb 18, 2009 #2


    User Avatar
    Homework Helper

    Welcome to PF.

    You might want to read up on Galileo's experiments in gravity.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook