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Ferris wheel is a structure with a set of parts that support it,give it shape and consistency.
Supports weights form and protects content.
It is stable,resistand and rigid.
It exerts power in the cabins,the point of support in the center.
In this case it is used as a fairground attraction but it is was formerly used to draw water.

PILAR TORREMOCHA RAMOS.

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the complete iron is a lever of the first type, the fulcrum is between the resistance and the power. We can see that the fulcrum is the hands, the power is the head and the resistance are the legs

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The nail clipper or nail clipper is a tool similar to a curved blade tongs that are used to cut the nails. It is usually metallic, there are different sizes, and is basically composed of two sheets joined at one end, which have cutting blades facing each other at the opposite end, and a handle placed in reverse on them. In most nail clippers, a more sharp blade and a lime surface are also included in order to remove the dirt accumulated under the nails and to be able to file them.

DINA AL MAKKAOUI

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Frist grade
The fulcrum lies between the applied force and the resistance.

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The excavator machine has gears hooked to a metal belt that makes it move easily in the sand. It is also a first degree lever.
José Adrián Céspedes Díaz

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the swing of the park is a lever of the first degree that means that the point of support is between the power and the resistance. if there is more weight on the power side, the side of the power goes down and the side of the support point goes up and if there is more weight at the point of support, the side of the support point goes down and the power goes up.

Blanca Sánchez López

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The ancient water mill of Berja ( Molino del Perrillo) is of a peculiar and very primitive sort, for their wheels are set horizontally instead of vertically and are turned by the oblique percussion of the water against a number of upright vanes, arranged like spokes.The grindstone runs on the same axis in a lower chamber, which greatly simplifies the mechanism and makes  the economical both is space and cost.
The mill was situated in a nineteen century house and has been used  during the last years of the 20 th century.
Nowadays the building is being repaired and will keep the mill and a museum.

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A bicycle chain is a gear mechanism with a chain, it has two cogwheels and it rotates simultaneously, transfering the power from the pedals to the drive-wheel of the bicycle, thus propelling it.

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The nutcracker is a lever of second type because the resistance is between the fulcrum and the potency.
María de Gádor Ramos Barrionuevo

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The crane is a leves of the first type. The crane is used in the construction. It has a triangulated structure that makes it able to support many load.
Parts of a crane :
• Brace
• Cab
• Counterweight
• Swing bearing

Elena Ocete Villegas

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It is a structure of strong elements joined together to support weights and forces.
This theatre has got static loads, this is for do not change over time. The structure is subject to suport stresses such as, compressive and flexural. Also, protect and support the elements of a set, close and cover spaces, store materials and people.
This theatre has stability, resistant and rigidy. Also, it is a mass structure, formed for mesh of vertical and horizontal pieces, such as pillars and beams.