1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Trying to Calculate The Minimum Force For Skateboard.

  1. Sep 19, 2015 #1
    I'm building an electric skateboard. I am trying to calculate the bare minimum force and torque to move a 180 lb object on 4 polyurethane wheels from standstill for motor selection. I got lost in finding the coefficient of friction for polyurethane wheels and whether I am using the equation for rolling friction or the standard model used in schools of a big block with mass moving across a floor with no wheels.

    Things I know I have to take into account are gravity, normal force, total weight of the whole system, force on each wheel, coefficient of friction and wheel size to find force and torque. Wind resistance is negligible.

    Much help appreciated.
  2. jcsd
  3. Sep 19, 2015 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Rolling friction is the important quantity, together with friction at the wheel axle. Plus motor losses, those won't be negligible.

    Don't forget a conservative safety factor as friction can increase, the ground can have some slope, wind might be relevant, and so on.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Trying Calculate Minimum Date
I Trying to reconcile two definitions of Entropy Jan 30, 2018
I Trying to understand diffraction Jan 10, 2018
Trying to calculate this? Mar 2, 2015
Help trying to calculate forces from Pro Wrestlers Jun 16, 2010
Try this calculation Dec 15, 2008