Mechanical Waves Chapter 17.1. What are Mechanical Waves? Mechanical wave = a disturbance in matter that carries energy from one place to another. The.

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Presentation transcript:

Mechanical Waves Chapter 17.1

What are Mechanical Waves? Mechanical wave = a disturbance in matter that carries energy from one place to another. The material through which a wave travels is called a medium. solids, liquids, and gases all act as mediums

A mechanical wave is created when a source of energy causes a vibration to travel through a medium. Source of Energy Vibration carries energy through rope Q. What is the medium? A. The rope

Types of Mechanical Waves Waves are classified by the way they move through a medium. Three main types: Transverse waves Longitudinal waves Surface waves

Transverse Wave Transverse wave = a wave that causes the medium to vibrate at right angles to the direction the wave travels transverse wave

Transverse Wave Crest = the highest point above rest position Trough = the lowest point below rest position Rest position CREST TROUGH

Longitudinal Waves Longitudinal wave = a wave in which the vibration of the medium is parallel to the direction the wave travels longitudinal wave

Longitudinal Waves Compression = an area in a medium where particles are spaced close together Rarefaction = an area in a medium where particles are spread out Compression Rarefaction

Surface Waves Surface wave = a wave that travels along a surface separating two media. Water Air In an ocean wave, what are the two media? ocean wave

Review 1.Which of the following is NOT true about mechanical waves? a)They carry energy b)They transfer matter c)They can be longitudinal d)They require a medium

Review 2.In which wave does the medium vibrate at right angles to the wave direction? a)Transverse b)Longitudinal c)Surface waves

Review 2.In which wave does the medium vibrate in the same direction as the wave direction? a)Transverse b)Longitudinal c)Surface waves