Copyright © 2004 S. B. Egliwww.stuegli.com Created by Mr. Egli September 2004

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Copyright © 2004 S. B. Egliwww.stuegli.com Created by Mr. Egli September 2004

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Axis – straight line at center of and normal to rotation path

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Radius - perpendicular distance from axis to center of object

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion - Ball on String When the string breaks which way does the ball go? Click on your choice below. String A B C ABC We know from Newton that bodies move in straight lines unless acted on by external forces! This direction is the TANGENT to the circle (path of motion)

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Centripetal Force = mv 2 /r ‘the force that is acting towards the axis’ NOTE: this can be a ‘push’ or a ‘pull’ v r

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion AxisRadius Linear Speed

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Revolution – axis outside of the object (moon orbiting the earth is revolving) Rotate – axis inside the body (earth rotates on its axis)

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Linear speed

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel The Radius Vector The radius for circular motion is a vector. It is shown at the left drawn in red. This radius vector locates the orbiting object. One should imagine an x, y coordinate system with its origin at the center of the circle. The radius extends from this origin to the position of the object. PreviousNextIntroduction Home The radius vector.

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Rotational Speed Units

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Centripetal Force = mv 2 /r ‘at ½ the radius the acceleration is doubled’ v r

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Centripetal Force

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Centrifugal force

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Simulated Gravity

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion Sample Solutions

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel Circular Motion

Copyright © 2004 S. B. Egli Copy slide to word Copy slide to word Copy Screen to Word Copy Screen to Word google Excel