Newtons law of gravitation: two particles of masses m1 and
m2, separated by a distance r, attract each other with a force
that is directly proportional to m1 and m2, and inversely
proportional to the square of r.
The acceleration due to gravity, g, depends on the force by
which the Earth pulls an object toward its center. Because the
gravitational force depends on the distance from the center of
the Earth, it follows that g depends also on that distance, and
thus on the height above the surface of the Earth.
For a satellite moving in a circular orbit around the
Earth, the gravitational pull by the Earth is equal to the
For the system consisting of the Earth and an object of
mass m at a height h above the surface of the Earth, the
gravitational potential energy is GmM/(R+h), where G is the
universal gravitational constant, M is the mass of the Earth,
and R is its radius.
If an object is launched from the surface of the Earth with
an upward velocity exceeding a certain threshold velocity,
known as the escape velocity, then the object will escape into
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.