Peoples Physics Concepts

http://www.ck12.org Chapter 2. One-Dimensional Motion

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/

Simulation

• http://simulations.ck12.org/Dungeon/

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1. Two cars are heading right towards each other, but are 12 km apart. One car is going 70 km/hr and the other
   is going 50 km/hr. How much time do they have before they collide head on?


2. You drive the 10 miles to work at an average speed of 40 mph. On the way home you hit severe traffic and
   drive at an average speed of 10 mph. What is your average speed for the trip?


3. The following data represent the first 30 seconds of actor Crispin Glover’s drive to work.

TABLE2.1:

Time (s) Position (m) Distance (m)

0 0 0

5 10 10

10 30 30

15 30 30

20 20 40

25 50 70

30 80 120

4. 
   
   
   
   1. Sketch the graphs of position vs. time and distance vs. time. Label yourxandyaxes appropriately.
   
   
   2. Why is there a discrepancy between the distance covered and the change in position during the time