# Mechanical / progressive / transverse / longitudinal waves

• Nishantkumar19
In summary, there are three types of waves: mechanical, transverse progressive, and longitudinal progressive. Mechanical waves involve a disturbance that causes particles to vibrate on the spot. Transverse progressive waves carry energy and move perpendicular to the direction of travel, while longitudinal progressive waves carry energy and move parallel to the direction of travel. Some sources classify sound waves as mechanical, while others classify them as longitudinal. Ocean waves and moving a rope up and down can also be described as mechanical or longitudinal waves. Seismic S waves are an example of transverse waves, as they are shear waves that cannot travel through liquids due to their lack of shear strength.
Nishantkumar19
Correct me if I'm wrong, but based on what I've learnt, there are three kinds of waves: mechanical, transverse progressive and longitudinal progressive.

Mechanical - A disturbance makes particles vibrate on the spot
Transverse progressive - Energy is carried, and moves perpendicular to the direction of travel
Longitudinal progressive - Energy is carried, and moves parallel to the direction of travel

Where do sound waves fall under in this system? Different sources say mechanical or longitudinal.
Also, what about ocean waves, or moving a rope up and down?

Nishantkumar19 said:
Mechanical - A disturbance makes particles vibrate on the spot

that and

Nishantkumar19 said:
Longitudinal progressive - Energy is carried, and moves parallel to the direction of travel

that ... are pretty much the same thing

Nishantkumar19 said:
Mechanical - A disturbance makes particles vibrate on the spot

is a very poor description as nothing will vibrate on the spot ONLY ... there will always be a wave that will radiate out from that spot

They are both compressional waves that radiate out from the source. They both describe sound waves and seismic P waves

Seismic S waves are an example of traverse waves. They are a shear wave and an important feature of traverse (shear) waves is that they won't travel through a liquid
This is because a liquid has no shear strength

Dave

## What are mechanical waves?

Mechanical waves are a type of wave that require a medium to travel through. This medium can be solid, liquid, or gas. Examples of mechanical waves include sound waves, water waves, and seismic waves.

## What is the difference between progressive and standing waves?

Progressive waves are waves that continuously move forward, while standing waves are waves that appear to be stationary. In standing waves, the energy of the wave is reflected back and forth between two points, creating a pattern of nodes and antinodes.

## What is the difference between transverse and longitudinal waves?

Transverse waves are waves where the particles of the medium move perpendicular to the direction of the wave motion. An example of this is a water wave. Longitudinal waves are waves where the particles of the medium move parallel to the direction of the wave motion. An example of this is a sound wave.

## How do transverse and longitudinal waves behave differently?

Transverse and longitudinal waves behave differently in terms of how they transfer energy. Transverse waves transfer energy by displacing the medium perpendicular to the direction of the wave, while longitudinal waves transfer energy by compressing and expanding the medium in the same direction as the wave.

## What factors affect the speed of a mechanical wave?

The speed of a mechanical wave is affected by the properties of the medium it is traveling through, such as density, elasticity, and temperature. In general, waves travel faster in denser and more elastic mediums, and slower in less dense and less elastic mediums.

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