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For more information, please see full course syllabus of AP Physics C/Mechanics
AP Physics C/Mechanics Motion in Two Dimensions, Part 1
Mathematically, a rotation is a rigid body movement which, unlike a translation, keeps a point fixed. This definition applies to rotations within both two and three dimensions (in a plane and in space, respectively.) A rotation in three-dimensional space keeps an entire line fixed, i.e. a rotation in three-dimensional space is a rotation around an axis. This follows from Euler's rotation theorem.All rigid body movements are rotations, translations, or combinations of the two.A Rotation is simply a progressive radial orientation to a common point. That common point lies within the axis of that motion. The axis is 90 degrees perpendicular to the plane of the motion. If the axis of the rotation lay external of the body in question then the body is said to Orbit. There is no fundamental difference between a “rotation” and a “orbit” and or spin. The key distinction is simply where the axis of the rotation lay, either within or without a body in question. This distinction is and can be demonstrated in and for both “ridged” and “non ridged” bodies.
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Post by Nana Magradze on September 18, 2018
why last two examples are delated?
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Post by Colton Dubrule on December 2, 2012
For some odd reason I kept thinking they were asking for 3R=h. But I was wrong. It's R=3h.
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Post by Alexandre Becker on November 20, 2012
I think that the second resolution is wrong, the professor use the Vertical speed, not the horizontal speed, (cos30*39,2). Am I right?
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Post by Arthur Bookstein on February 15, 2012
Brilliant!
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Post by SOUFIANE LAMOUNI on March 24, 2011
I'm Lucky to have you as a Professor , Thank you for your step by step Method !