FIRST, view the video below and THEN, read over the information that follows. Once that has been accomplished, complete the assignment that follows.
Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
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Explain the difference between the function and the design of a device. (pg. 306)
Question 12
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What personal and societal factors influenced the changes in devices used to open aluminum cans? (pg. 308)
During the research phase, when a device is improved upon, certain criteria are taken into account. Of the criteria listed below, which would be the least important ...
function
efficiency
effectiveness
convenience
Mechanical devices are evaluated so that the consumer who is ultimately going to use it can make a better choice. Another important reason to carefully evaluate a mechanical device is to ...
determine how it can be improved
lower its cost
make it more fashionable
find its esthetic value
The design of mountain bikes to handle the rough terrain they would be used in, is considered to be
evaluating a function because of this influence ...
mass appeal
mass demand
environment
ergonomics
Opening a can has evolved from the earliest cans which were made from iron in 1810. These can were
opened by using a ...
church key
hammer and chisel
push button
removable tab
The design and development of opening mechanisms for aluminum cans went through four distinct
designs. To get the liquid out of the can you need one large hole or two smaller holes. If two holes are
needed, the first is designed to let air into the can, and the second hole is designed to ...
create pressure
restrict flow
let the fluid out
be just for show
The "church key" was the first practical design for opening a can. It was a simple machine that multiplied the force needed to open the can. The simple machine it was designed after was the ...
wedge
1st class lever
2nd class lever
3rd class lever
Another simple machine was built into the removable tab top. It consisted of a small ring that acted like a lever and would make the necessary hole by removing the tab from the can. This was a huge
improvement, but it also created a huge problem. The problem it created was ...
scientific
environmental
industrial
commercial
By pressing on one of the buttons first - to release the pressure of the contents - before pressing on the
second one - to have a hole large enough to drink out of - button cans were less problematic. The
pressure in the can came from ...
atmospheric pressure
force applied to the button
the contents of the can
external force causing internal pressure
Environmental concerns created further improvements in can-opening devices throughout the 20th century. The ‘ecology top’ was the name given to the ...
Church Key
Removable Tab Top
Button Top
Non-removable Tab Top
In a real evaluation of a mechanical device, designers always begin with ...
a list of things that they want in the device
ideas of how to start mass production of the device
cost-effectiveness issues and marketing strategies
ways that safety and efficiency can be improved upon
