You’ve learned that motion is just a change in position and can be measured by dividing the distance traveled by the time it took to move, or the speed. But what causes motion? What starts you walking down the street or a ball rolling? And what changes motion? Why does a ball thrown up in the air slow down, stop and come back down again?
Watch this animation to find out what causes and changes motion. As you watch the segment, you might want to check the definitions of specific terms. In addition to the glossary words listed above, the term magnitude, and the concepts of unbalanced and balanced forces, will be described.
Stop the animation at any time, watch it again, or read the transcript.
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In the space below write a definition of force. List two things that forces can do. Then list two types of forces.