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: Motion question

  1. Nov 18, 2007 #1
    Hi Im having trouble finding the correct method for tackling this question. Should I be using equations of motion?because then I know that gravity would make it accelerate at 9.81m/s^2 but Im confused... any help would be appreciated.

    A toy truck of mass 80g is released from height h and rolls down a slope as shown. What would the height h have to be for the truck to reach a speed of 4.0m/s at the bottom of the slope, assuming friction is negligible.

    Attached Files:

  2. jcsd
  3. Nov 18, 2007 #2


    Staff: Mentor

    I would use energy conservation rather than equations of motion. Equations of motion would require that you know the slope of the hill, conservation does not.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook