In an elastic collision, mechanical energy is conserved,
i.e., no heat is generated. The collision of billiard balls may
be taken to be elastic.
In an elastic collision in one dimension, it is usually the
case that the velocities of the objects before collision are
known. Conservation of mechanical energy and momentum provide
the equations that determine the velocities after
For collisions in two dimensions, it is important to keep
in mind the vectorial nature of the momentum. The x-component
of the total momentum before collision is equal to the
x-component of the total momentum after collision, and
similarly for the y-component.
Collisions, Part 2
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.
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 full length practice exams modeled on the real test and all the terms and concepts you need to know.
This book includes a review of all the topics tested including vectors, kinematics, fluid mechanics, optics and nuclear physics. Additionally, the book includes two full length tests made complete with descriptive solutions, and quick study tables for Physics B formulas and equations.