Science 8-2: Mech. Systems Section 3.0 Q

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 ...

Mechanical devices are evaluated so that the consumer who is ultimately going to use them can make a better choice. Another important reason to carefully evaluate a mechanical device is to ...

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 ...

Opening a can has evolved from the earliest cans which were made from iron in 1810. These cans were opened by using a ...

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 ...

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 ...

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 ...

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 ...

Environmental concerns created further improvements in can-opening devices throughout the 20th century. The ‘ecology top’ was the name given to the ...

CSA is a non-government association that tests and approves a wide range of products to ensure they are

safe for use by the consumer. CSA stands for ...

In a real evaluation of a mechanical device, designers always begin with ...

Sometimes a new device is designed when someone who thinks there can be an easier way to do something makes an observation. An inventor observed a driver manually cleaning snow and ice off the windshield of a streetcar in freezing cold weather, this observation prompted the invention of this ...

Advances made in the technological improvement of mechanical devices came as a result of electricity. The

widespread use of electricity outside of Canadian towns and cities didn’t occur until the ...

New technologies often develop from scientific research that seems to be unrelated. Particle accelerator research experiments led to the technology behind trains powered by electricity and magnets. These trains

‘float’ on the tracks. They are known as

A particle accelerator is a huge complex machine that does this ...

Robot technology is widely available and in use today, mainly in industry. The first use of the term ‘robotnik’, which is a Czech word meaning ‘workers’ or ‘slaves’, was in a Czechoslovakian ...

Improvements in robot technology came as a result of industry trying to ...

Robots are extremely complex devices and vary widely in appearance, depending on the job they are designed to do. A simple robot however has some or all of these basic parts: body, motor devices, power source, sensors, output devices, microprocessors. Spirit and Opportunity are robot rovers on the planet Mars. The solar panels on the robots are examples of these basic parts ...