TABULA/samples/Church Clock
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This is SAMPLE1. To work with this sample, enter $1
Church Clock ┌ {1} 75 ft height of tower ├ {2} 800 kg mass of weight ├ {3} 9.813 m/s² acceleration; gravity= ┌ └>{4} 179458 J energy stored in hanging weight │ ┌ {5} 3.100 A h battery charge= │ ├ {6} 17 V battery potential= ├ └>{7} 189720 J energy stored in battery └> {8} 0.946 / {4}/{7}
Rationale
The clock of a historic church is driven by a heavy weight which needs to be hauled daily up to the top of a 75 ft tower.
The volunteer for this task wonders how much energy is thereby stored, and how this compares with the energy stored in the battery of his laptop computer, which also contains a clock.
To his astonishment, the two energy quantities are roughly equal.
What mass of hanging weight would make them exactly equal?
Try it out
- Select item {1} and click tool hold
This holds {1} to stop its value changing at the next step. - Select item {8} and click tool set1u
This forces {4} to become equal to {7} - Note the increase in "mass of weight" {2}.
- Reload the sample and repeat these steps. But this time hold item {2} to keep the weight fixed, not {1}.
- Note the increase in "height of tower" {1}.
Build this t-table
- [UNFINISHED]