17.1 Mechanical 17.1 Mechanical WavesWaves

1. Describe how 1. Describe how mechanical waves are mechanical waves are produced.produced. Mechanical waves are produced Mechanical waves are produced

when a source of energy causes a when a source of energy causes a vibration to travel in a medium.vibration to travel in a medium.

A medium is the material that the A medium is the material that the wave travels through. wave travels through.

Examples – all phases of matterExamples – all phases of matter Mechanical waves are classified by Mechanical waves are classified by

the way they move through a mediumthe way they move through a medium

2. List the 3 main types of 2. List the 3 main types of mechanical waves.mechanical waves.

TransverseTransverse LongitudinalLongitudinal Surface Surface

waveswaves

3. For each type of wave 3. For each type of wave compare the vibration of compare the vibration of the medium to the direction the medium to the direction of the wave.of the wave. Transverse waveTransverse wave: medium vibrates : medium vibrates

perpendicular to the direction the wave perpendicular to the direction the wave travelstravels

Longitudinal waveLongitudinal wave: medium vibrates : medium vibrates parallel to the direction the wave travelsparallel to the direction the wave travels

Surface waveSurface wave: a circular motion as the : a circular motion as the medium vibrates both perpendicular and medium vibrates both perpendicular and parallel to wave directionparallel to wave direction

4. Name one example of 4. Name one example of each type of wave.each type of wave. Transverse: shaking the end of a Transverse: shaking the end of a

roperope Longitudinal: compressions and Longitudinal: compressions and

rarefactions moving along a spring rarefactions moving along a spring (slinky)(slinky)

Surface waves: deep water waves in Surface waves: deep water waves in the oceanthe ocean

5. How are transverse and 5. How are transverse and longitudinal waves similar? longitudinal waves similar? How are they different?How are they different?

Both carry energy through a medium Both carry energy through a medium without transferring matterwithout transferring matter

Transverse: vibration perpendicular Transverse: vibration perpendicular to wave directionto wave direction

Longitudinal: vibration parallel to Longitudinal: vibration parallel to wave travelwave travel

7. In the surface wave diagram 7. In the surface wave diagram in your book, why is the first in your book, why is the first position of the bobber the position of the bobber the same as the 5same as the 5thth position of the position of the bobber?bobber? The bobber has moved in a full circle The bobber has moved in a full circle

that returns it back to its starting that returns it back to its starting position. position.

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