A Wave on a String String at rest.

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Presentation transcript:

A Wave on a String String at rest. Wall String at rest. A string is fastened to the wall at one end And held by your hand at the other

A Wave on a String You pull the string upwards by an upward force, F. The first particle of the string is pulled upwards Due to intermolecular forces, the particle next to it will move upwards a moment later This particle causes the one next to it to move up

A Wave on a String You then pull the string down Once the first particle has reached its highest point (known as the amplitude), it is pulled downwards The particle next to it is still rising and later reaches its highest point The second particle, is then pulled downwards

A Wave on a String This produces an arc shape, or a “wave” The wave “moves” down the length of the string, particle by particle Do the particles of the string move from left to right ?

A Wave on a String Energy is transferred from one end of the string to the other Particles vibrate in place But no particles of the string actually change location or translate The string acts as a medium across which mechanical energy is transfered

A Traveling Wave The arc shape can be described as a waves function, f(t). The wave energy moves with velocity, v

Class notes: - Traveling wave - Simple Harmonic Motion - Anatomy of a wave