The types of mechanical work include static work, dynamic work, and intensive work. Static work refers to work done without motion, dynamic work involves movement, and intensive work focuses on the internal energy changes within a system.
Input work is the work done on a machine, while output work is the work done by the machine. Efficiency of a simple machine is calculated as the ratio of output work to input work. The efficiency of a simple machine is high when the output work is close to the input work, indicating that the machine is converting most of the input work into useful output work.
The formula that relates work and power is: Power = Work / Time. Power is the rate at which work is done, which is the amount of work done divided by the time it takes to do that work.
The work that a simple machine does is called mechanical work. It refers to the amount of force applied over a distance to accomplish a task using the simple machine.
The formula to find the work output of efficiency is: Work output = Efficiency x Input work. Efficiency is a ratio of output work to input work, so multiplying this ratio by the input work gives the work output.
A Carpenter?
There are a number of web sites that sell pergolas for the garden. Try companies like "Gardenworld", "For The Garden" and "White Pavillion" for best results.
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You can check at www.diynetwork.com/topics/pergolas/index.html or at www.diynetwork.com/topics/pergolas/index.html. the last one mentioned gives you free plans and also building instructions.
Pergolas vary in cost depending on the material used and complexity of the design. The best way to determine cost is to sketch an idea of the pergola and send it to a timber framing company for a quote. Roughly, the cost will range from $10 a board foot of timber to over $50 per board foot plus the cost of the earth work and foundation.
It is not required to paint them but you can if you so chose to.
Blou Reen is a creeper that are used on pergolas for shade (see Picture)
Try Google Sketchup.
Pergolas are not considered structural elements of a house as they are typically freestanding or attached to the exterior of a structure for aesthetic or functional purposes, such as providing shade or defining an outdoor space. Structural elements of a house are components that support the building's weight and integrity, like beams, columns, and foundations.
They are actually just called gazebos. Pergolas are very pretty, too, to get married under.
You either mean an Arbor or a Pergola... pergolas are usually attached to the house, but you can also build them free-standing.
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