In our Design and Technology class this week we were reminded of the importance of basic calculations when designing. The lecture was taken by Ben Craven. Using even the most basic of calculations can we determine the practical feasibility of our idea.
An idea was proposed to harvest the energy of shutting a filing cabinet
This calculation was very optimistic and very rough (as it should be) but it was a very quick way to assess that the idea was not going to work.
Important definitions. Precision – decimal places. Accuracy – how close to the real answer. Can be easily mixed up .
Similar to this proposal current proposal.
Incorporating early basic calculations is something I will now incorporate more into my design work.
It is good to have an idea of values and to quantify them eg time mass and density. I plan to build up a list of common values to help with these calculations.
Minute = 60s
Hour = 60m = 3600 s
Day = 24h = 1440m = 86,400
Week = 7d = 168h = 10,080m = 604,800s
Month = 30d = 720h = 43200m = 2,592,000s
Year = 365d = 8,760h = 525,600m = 31,536,000s
Human – 70 kg
Small car – 1000 kg
Bag of flour / 1 litre of water – 1kg
Lots more material properties here
Picture credit – redbubble.com