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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.

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  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.
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