Here, we have a sort of lightweight concept that will help pave your understanding of the later topics pertaining to rotational motion. As of yet we havent needed to consider the exact center of a car we collided or box we lifted with our Atwood, however in rotational dynamics it will be important to know the location of the center of mass. There are a few techniques for finding the center that you will learn in this video. Once you have a good understanding of this concept and feel comfortable with it, move on to the next half of the mechanics courserotation dynamics.
You can treat an entire complex object as if its entire mass were contained at a single point known as the object’s center of mass.
Center of mass is the weighted average of the location of mass in an object.
For uniform density objects, the center of mass is the geometric center.
For objects with multiple parts, find the center of mass of each part and treat those as point particles.
The center of gravity is the location at which the force of gravity acts upon an object as if it were a point particle with all its mass focused at that point.
In a uniform gravitational field, center of gravity and center of mass are the same. In a non-uniform gravitational field, they may be different.
Center of Mass
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Physics C concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes 2 full length practice exams modeled on the real test, 3 separate plans to fit your study stle, review material updated to the most recent tests, and all the terms and concepts you need to know.