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Interpreting Motion

Interpreting Motion. How to read an Acceleration vs. Time graph. Acceleration vs. time. a (m/s/s). Shows the rate of acceleration and direction (+ or -) which is determined from the slope on the v vs t graph. +a. t (s). -a.

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Interpreting Motion

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  1. Interpreting Motion How to read an Acceleration vs. Time graph

  2. Acceleration vs. time a (m/s/s) Shows the rate of acceleration and direction (+ or -) which is determined from the slope on the v vs t graph +a t (s) -a We can’t tell if the object is speeding up or slowing down without having the corresponding v vs t graph or d vs t.

  3. Speeding up v Is the velocity in the positive or negative direction? +v +a Is the acceleration positive or negative? t 0 -a -v Velocity and acceleration are in the same direction so both objects are speeding up!

  4. Slowingdown (deceleration) v Is the velocity in the positive or negative direction? +v -a Is the acceleration positive or negative? t 0 -v +a Velocity and acceleration are in opposite directions so both objects are slowing down!

  5. Speeding Up or Slowing Down? Is the velocity positive or negative? +v v Is the acceleration positive or negative? -a t -v Is the velocity positive or negative? -a Is the acceleration positive or negative? Top portion shows slowing down. Bottom portion shows speeding up in opposite direction.

  6. Stationary v a d t t t

  7. Constant velocity v a d t t t

  8. Accelerating v a d t t t

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