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Find time in physics

  1. Sep 28, 2008 #1
    A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp.If the back of the truck is 1.4 m above the ground and the ramp is inclined at 20 degress, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?

    i have know idea how to set this problem up
  2. jcsd
  3. Sep 28, 2008 #2
    Draw freedody diagram and every thing will be clear
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