HELP me please! I have no clue what to do! Please walk me through and show me ho

Question

HELP me please! I have no clue what to do!

Please walk me through and show me how to work this problem.

From the given materials list, design a device that will weight a bundle of nails. The nails will be between 100 and 1000 grams. You should sketch the device and perform calculations that show how it works. Use an angle measurement for weight. Don't just balance the weights on a see-saw.

Materials List:
Wooden Yard Stick
10 feet of monofilament fishing line

Protractor

500 gram known standard mass

Student provided "extras"

Grading:
100 points possible for the design and analysis you bring to class

70 points possible for the accuracy of your device and post mortem.

30 points Question: Why don't scales (like the ones in the doctor's office, or chemistry lab) just use a see-saw and calculate weight from SUM OF MOMENTS = 0? Hint: These scales in the doctor's office and chemistry lab have an angle measurement.

Explanation / Answer

http://www.emporia.edu/ksn/v06n4-april1960/index.html

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