Lets look at how the seemingly simple topics youve learned have actually been everything you need to calculate so many things, like things going on in space! Keeping in mind your lessons on rotational motion, and with a new equation, youll be able calculate seemingly difficult things such as the orbit of a satellite. In space, youre dealing with the gravitational force between all the planets (some negligible, some not) and thats it; no friction, heat, retarding forces. In addition to the gravitational force, youll learn about Keplers laws and touch upon the properties of orbiting planets. With this course youve completed the learning portion of the AP Physics C: Mechanics course!
Any two masses exert an attractive force on each other, known as the gravitational force.
Gravity is a non-contact force, known as a field force. Its effects are observed without the two objects coming into contact with each other.
A gravitational field describes the gravitational force a mass feels when placed at a particular point in space.
Inside a hollow sphere, the gravitational field is zero. Outside the sphere, you can treat the sphere as if its entire mass was concentrated at the center.
Inside a solid sphere, treat the sphere as if the mass inside the radius is all at the center. Outside the sphere, treat the sphere as if all the mass is concentrated at the center.
The velocity of a satellite is independent of the satellite’s mass.
Kepler’s Laws of Planetary Motion:
The orbits of planetary bodies are ellipses with the sun at one of the two foci of the ellipse.
If you were to draw a line from the sun to the orbiting body, the body would sweep out equal areas along the ellipse in equal amounts of time.
The ratio of the squares of the periods of two planets is equal to the ratio of the cubes of their semi-major axes. The ratio of the squares of the periods to the cubes of their semi-major axes is referred to as Kepler’s Constant.
Gravity & Orbits
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.