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

Calculate the mass of a trolley

  1. Apr 16, 2009 #1
    Hi every body hope you can help. I have been set a problem to solve the mass of a trolley. The trolley is sat on an air track, attached is a string which is lead over a pulley and has a mass attached at the end hanging over the edge. The mass at the end has 1.4 meters to fall and does it in 3.4 sec, hence moving the trolley along the air track.

    Mass of the weight is 10 grams
    Mass of the pulley is 34 grams and has a diameter of 49mm
    Distance above ground is 1.4m and the time taken is 3.4secs

    I know this is an energy problem i.e P.E goes to K.E and i think the Inertia (I) of the pulley is I=mr^2. Were m is the mass of the pulley and r is the radius of the pulley.

    At the start i've got the potential energy of the weight but after that i'm stuck and can't figure out how to calculate the mass of the trolley. Hope someone can help every time i do it the mass of the trolley ends up at like 2700grams which i know is wrong.

    Thanks in advance James
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Calculate the mass of a trolley
Loading...