Mechanical Waves. In mathematics and science, a wave is a disturbance that travels through space and time, usually accompanied by the transfer of energy.mathematicssciencespace.
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Slide 1
Mechanical Waves
Slide 2
In mathematics and science, a wave is a disturbance that
travels through space and time, usually accompanied by the transfer
of energy.mathematicssciencespace time energy
Slide 3
What are mechanical waves? A mechanical wave is a disturbance
in matter that carries energy from one place to another.
Slide 4
3 Main Types of Mechanical Waves Transverse Longitudinal
Surface
Slide 5
Transverse Waves A transverse wave causes the medium to vibrate
in a direction perpendicular to the direction in which the wave
travels.
Slide 6
Transverse Waves A transverse wave is a wave in which particles
of the medium move in a direction perpendicular to the direction
that the wave moves
Slide 7
Shaking one end of a rope up and down creates Transverse
Waves
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Human Wave is a Transverse Wave
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Direction of the Transverse Wave
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Check for understanding. Move a rope up and down and observe
the waves. How does the direction of the wave compare with the
direction in which the rope moves? Create a human wave like at a
ball game. How does the direction of the wave compare with the
direction in which the wave moves? In a transverse wave, the
particle motion is perpendicular to the direction of the wave
velocity. A transverse wave may be created by shaking one end of a
rope up and down or side to side. One example is a ripple on a
pond.
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Longitudinal Waves = A longitudinal wave is a wave in which the
vibration of the medium is parallel to the direction of the wave.
parallel circuit parallel port parallel planting
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Longitudinal Waves
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Check for Understanding: What are compressions and rarefactions
in Longitudinal Waves? An area where the particles are spaced close
together is called a compression. An area in a medium where
particles are spread out is called a rarefaction.
Slide 18
Surface Waves Surface waves are combinations of transverse and
longitudinal waves. These waves occur at the surface between two
mediums, such as water and air. Up-and-down motion combines with
back-and-forth motion. The combination produces circular
motion.
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Surface Waves
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Surface Wave A surface wave is a wave that travels along a
surface separating two media.
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http://www.youtube.com/watch?v=7yPTa8qi5X8 A surface wave is a
wave that travels along a surface separating two media, such as
water and air.
Slide 22
Check for Understanding Surface Waves Where do surface waves
occur? at the surface between two mediums. How do surface waves
move? up and down like a transverse wave on a rope, and back and
forth like coils in a spring.
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Vocabulary: Properties of Mechanical Waves wavelength, The
wavelength, is the distance from any point on the wave to the
adjacent point(one complete wave). amplitude The amplitude of a
wave is the maximum height of the wave. The amplitude does not
affect the wave speed. frequency, Hz The frequency, Hz of a wave is
the number of oscillations of cycles during an amount of time,
usually a second. Frequency is measured in Hertz. One hertz is one
cycle per second. period The period of a wave is the time it takes
for the wave to travel a distance of one wavelength.
Wave examples which illustrate the definitions
http://paws.kettering.edu/~drussell/Demos/waves-intro/waves-intro.html
http://paws.kettering.edu/~drussell/Demos/waves-intro/waves-intro.html
Transverse Waves Longitudinal Waves Surface Waves
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A disturbance that transfers energy from place to place. A
source of energy that causes a medium to vibrate. Where do waves
get their energy? Transverse- human wave; shaking a rope
Longitudinal- coiled spring; sound Surface- ocean wave Give
examples of the 3 main types of waves. Solid Medium (e.g. land) Gas
Medium (e.g. air) Liquid Medium (e.g. water) How are mechanical
waves carried?