A mechanical wave is a self sustaining disturbance of a
medium that propagates within the medium carrying energy and
Mechanical waves require (1) a source of disturbance, (2) a
medium that can be disturbed, and (3) a mechanism by which a
portion of the region can influence adjacent regions.
In a transverse wave, such as a wave on a string, the
displacement is perpendicular to the direction of propagation
of the wave.
In a longitudinal wave, such as a compression wave in a
spring, the displacement is along the direction of propagation
of the wave.
The speed of a mechanical wave is determined by the
properties of the medium in which the wave propagates.
A wave on a string travels with a speed equal to SQRT
(T/mu), where SQRT stands for square root, T is the tension in
the string, and mu is the mass of the string divided by its
If a pulse strikes a fixed boundary, the reflected wave
will be inverted. No inversion occurs if the boundary is
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.