4.21 Newton’s First Law
FIGURE 4.39
FIGURE 4.40
Video Break
Laura learned how to use forces to start and stop her skateboard by watching the videos below. Watch the video to
see how the forces are applied. You can pick up some skateboarding tips at the same time!
Starting: http://www.youtube.com/watch?v=OpZIVjbMAOU
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/82428