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Homework Help: Forces acting on an object

  1. Oct 8, 2008 #1
    1. The problem statement, all variables and given/known data

    1) Identify all of the forces acting on you as the car travels at a perfectly steady speed on level ground

    2) Repeat part 1 with the car slowing down.


    2. Relevant equations

    N/a

    3. The attempt at a solution

    1)The forces acting on the car at constant velocity include:
    A normal force, gravitational force, the applied force of the car, Force of friction

    Please note that in order for the car to travel at constant speed, Normal Force = Gravitational Force, and the applied force of the car = Force of friction

    2) The forces acting on the decelerating car include
    A normal force, gravitational force, Force of friction

    Is this correct?
     
  2. jcsd
  3. Oct 8, 2008 #2
    In the second situation, there is still a force that is the car is applying ; It is simply less than the frictional force.
     
  4. Oct 11, 2008 #3
    Wouldnt the gravitational force and normal force just cancel each other out because the car is not moving up or down into the road...?
     
  5. Oct 11, 2008 #4
    They would cancel each other out, but you still have to list them as forces acting on the car.
     
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