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You and a friend drag a 28.8 kg fallen tree branch across a level field. You...

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Physics

You and a friend drag a 28.8 kg fallen tree branch across alevel field. You pull with a force of 135.0 N at an angle of 25.0ºabove the horizontal while a friend’s pull force is parallel to theground, the kinetic coefficient of friction between the branch andthe ground is µk=0.825 and the static coefficient of friction isµs=0.925. The branch starts from rest and is dragged 20.0 m in 15.0s.

  1. What is the acceleration of the branch?
  2. What is the magnitude of the normal force acting on thebranch?
  3. What is the magnitude of your friend’s pull force?
  4. If you and your friend were to stop pulling and then yourfriend leaves, would you be abele to get the branch moving againwith the same force? If yes, prove it, if not, what force is neededto start the branch moving?

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