Motion, or kinematics, is one of the most basic yet most useful sections in all of mechanics; you will take what you learn here and apply it to countless problems in the mechanics world. Here, we discuss the elements youll deal with in kinematic problems, such as the velocity vector, speed, and acceleration. Combined with mass, these are the backbone elements of mechanics. A bit of warning beforehand is to be aware of units! Unless otherwise stated, you should deal with kilograms (kg) for mass, meters (m) for displacement, and seconds (s) for time. These are the most universally used units in all of physics, so its important to remember what they are. Next, well continue our discussion on kinematics in greater detail.
An object’s position is its location at a given point in time.
The vector from the origin to the object’s position is the position vector, r.
The change in an object’s position is called displacement.
Velocity is the time rate of change of displacement: v=dx/dt.
Acceleration is the time rate of change of velocity: a=dv/dt.
The slope of the position-time graph is the velocity. The slope of the velocity-time graph is the acceleration.
The area under the acceleration-time graph gives you change in velocity. The area under the velocity-time graph gives you change in position.
For cases of constant acceleration, you can utilize the kinematic equations to solve for unknown quantities.
Objects under the force of gravity only are said to be in free fall.
The acceleration due to gravity on the surface of Earth is 9.8 meters per second per second toward the center of the Earth.
Describing Motion I
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.