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Physics definitions chapter 14
Terms in this set (29)
Any motion that repeats in a regular cycle.
Simple Harmonic Motion
A motion that occurs when the restoring force on an object is directly proportional to the object's displacement from equilibrium.
In any periodic motion, the amount of time required for an object to repeat one complete cycle of motion.
In any periodic motion, the maximum distance an object moves from equilibrium.
States that the force acting on a spring is directly proportional to the amount that the spring is stretched.
A device that can demonstrate simple harmonic motion when its bob (a massive ball or weight), suspended by a string or light rod, is pulled to one side and released, causing it to swing back and forth.
A special form of simple harmonic motion that occurs when small forces are applied at regular intervals to an oscillating or vibrating object and the amplitude of the vibration increases.
A disturbance that carries energy through matter or space; transfers energy without transferring matter.
A single disturbance or pulse that travels through a medium.
A mechanical wave that moves up and down at the same time.
A mechanical wave that vibrates perpendicular to the direction of the wave's motion.
A mechanical wave in which the disturbance is in the same direction, or parallel to, the direction of wave motion.
A mechanical wave in which the particles move both parallel and perpendicular to the direction of wave motion.
The low point of a wave.
The high point of a wave.
The shortest distance between points where the wave pattern repeats itself, such as from crest to crest or from trough to trough.
The number of complex oscillators that a wave makes each second; is measured in hertz, Hz.
A wave that strikes a boundary between two media.
An erect or inverted returning wave that results from some of the energy of the incident wave's pulse being reflected backward.
Principle of Superposition
States that the displacement of a medium caused by two or more waves is the algebraic sum of the displacements of the individual waves.
Results from the superposition of two or more waves; can be constructive (wave displacements in the same direction) or destructive (waves with equal but opposite amplitudes).
The stationary point where two equal wave pulses meet and are in the same location, having a displacement of zero.
The point with the largest displacement when
two wave pulses meet.
A wave that appears to be standing still, produced by the interference of two travelling waves moving in opposite direction.
A line representing the crest of a wave in two dimensions that can show the wavelength, but not the amplitude, of the wave when drawn to scale.
A line that can show the direction a wave is traveling and is drawn at a right angle to a wave's crest.
The line in a ray diagram that shows the direction of the barrier and is drawn at a right angle, or perpendicular, to the barrier.
Law of Reflection
States that the angle of incidence is equal to the angle of reflection.
The change in direction of waves at the boundary between two different media.
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