Amplitude: The maximum displacement of a wave crest from its equilibrium position.
The SI unit of measure is the meter. Its symbol is A .
Equilibrium: A condition in which all the forces acting on an object are balanced.
Frequency: The number of complete oscillations occurring in a given unit of time.
The SI unit of measure is oscillations per second.
Its symbol is f . (the frequency is the reciprocal of the period)
Force Constant: A constant of proportionality for springs which indicates the relative stiffness
or elasticity of the spring when it is stretched within its elastic limits.
The SI unit of measure is Newtons per meter. Its symbol is k .
Simple Harmonic Motion: SHM refers to the periodic motion of an object acting under the
influence of a linear restoring force. The motion is characterized
by an oscillation about an equilibrium position such that the
acceleration vector of the object is constantly changing, always
directed toward its equilibrium position, and directly proportional to
its displacement from equilibrium.
The SI units are Newtons per meter.
Oscillation: Any periodic vibration or cycle of motion about an
equilibrium position. An oscillation is characterized by its
frequency, period, and amplitude.
Period: The time required for a complete oscillation or vibration.
The SI units are seconds. (period is the reciprocal of the frequency)
Periodic Motion: Any type of motion that successively repeats itself in equal intervals of time.
Restoring Force: A force that causes an object to return to an equilibrium position from which
it has been displaced.
The SI units are Newtons.
Trigonometric Function: A mathematical function used to model, among other things, periodic
phenomena. Examples are sine, cosine, and tangent.
Young’s Modulus: The property of an object characterized by a constant ratio of
stress to strain.
The SI units are Newtons per square meter. It’s symbol is Y .