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One Dimensional Motion Review of the basics

One Dimensional Motion Review of the basics. AP Physics. Terms. Displacement vs. Distance Displacement: Change in position ( vector ) Distance: How far an object has traveled ( scalar ). Terms. Velocity vs. Speed Velocity: Rate of the change in position (vector)

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One Dimensional Motion Review of the basics

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  1. One Dimensional MotionReview of the basics AP Physics

  2. Terms Displacement vs. Distance Displacement: Change in position (vector) Distance: How far an object has traveled (scalar)

  3. Terms Velocity vs. Speed Velocity: Rate of the change in position (vector) Speed: Rate of distance covered (scalar)

  4. Terms Acceleration vs. Acceleration? Acceleration: The rate at which velocity changes (vector) This could be a change in: Speed Direction Speed and direction

  5. Position vs. Time Graph

  6. What are the velocities?

  7. Average Velocity on an x-t graph

  8. Average velocity vs instantaneous velocity on an position – time graph As the two points P1 and P2 get closer, the time frame (∆t) gets smaller and smaller approaching zero. Eventually you are considering a moment in time rather than a period of time. Graphically, you are looking at the slope of a tangent line rather than the slope of the line connecting two points.

  9. Instantaneous Velocity on an x-t graph

  10. Velocity vs. Time Graph The slope of a v vs. t graph is the acceleration The area between the curve and the horizontal axis of a v vs. t graph is the displacement

  11. Instantaneous Acceleration vs Average Acceleration from a v-t graph As the two points P1 and P2 get closer, the time frame (∆t) gets smaller and smaller approaching zero. Eventually you are considering a moment in time rather than a period of time. Graphically, you are looking at the slope of a tangent line rather than the slope of the line connecting two points.

  12. What are the accelerations and displacements?

  13. Acceleration vs. Time Graph The slope means NOTHING The area between the curve and the horizontal axis is the change in velocity a 10 s t -10 m/s/s

  14. Important Acceleration tells us how fast velocity changes Velocity tells us how fast position changes

  15. Falling Bodies, thrown up objects, and the y-direction All things fall at the same rate (neglecting air resistance) On earth that rate is 9.80 m/s2DOWN WATCH THE DIRECTION! The name of that acceleration is Gravitational acceleration

  16. Thanks! This is a good quick review for kinematics. However, it is just a review not the end all be all of kinematics.

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