http://www.ck12.org Chapter 2. Motion in a Straight Line
In the image above, the red line is the position vs time graph and the blue line is an approximated slope for the line at
t= 2 .5 seconds. The rise for this slope is approximately 170 m and the time interval (run) is 4.0 seconds. Therefore,
the approximated slope is 43 m/s.
Summary
- The slope of a position versus time graph is the velocity.
- For constant velocity motion, the slope gives the constant velocity, the average velocity, and the instantaneous
velocity at every point. - For constant acceleration motion, the slope of the position versus time curve at a particular point gives the
instantaneous velocity at that point.
Practice
Questions
Draw a velocity versus time graph for an object whose constant velocity is 15 m/s and whose position starts atx= 0
whent=0. Graph the motion for the first 5.0 seconds.
Use this resource to answer the questions that follow.
http://www.youtube.com/watch?v=sujsb5ZlM8o
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/60692- In the graph on the video, what is graphed on the vertical axis?
- What is graphed on the horizontal axis?
- What does the slope of this graph represent?
Review
Questions