Physical Science 9 Practice Test Solutions
  1. A car drives north from the IC Norte. It starts at 12:30:00pm and ends up traveling 1.5 km distance by 12:33:00pm. What is the elapsed time? What is the car's final position? What is the displacement of the car from the IC? What is the car's velocity in m/s? What is the car's speed?

    2. 3 minutes = 180 s
    1.5km North of IC = 1500m N of IC
    same
    8.33m/s North
    8.33m/s
  2. A plane is flying at 200 m/s eastward. The engines cut out and while maintaining the same altitude and direction the pilot notices the plane's speed has cut in half after 2 minutes. What is the acceleration of the plane? (Remember direction. Acceleration is a vector.)

    3. the final velocity will be 100m/s east, so the change in velocity is 100m/s west
    elapsed time is 120 s
    acceleration is change in velocity over elapsed time = 100m/s west divided by 120 s = 0.833m/s2 west
  3. A ball drops from a building 20 m high. How long until it hits the ground? With what speed will it hit the ground?

    4. use x=4.9m/s2t2
    The question can be interpreted as asking "what is the time when x is 20 m"
    You get 20m = 4.9m/s2t2 and need to solve for t
    t = square root of (20m/4.9m/s2) = 2.02s
  4. Choose two of the scenarios above and graph them on a position vs time graph.
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