The device above is an ancient steelyard used for measuring

The device above is an ancient steelyard, used for measuring things. Which object is the standard weight? Which modification would provide more precise results: a shorter arm with a heavier ball, or a longer arm with a lighter ball? And why? If the standard has a mass of 100-grams, estimate the largest amount of mass that could be measured.

Solution

Q3: \"bust of athena\" used as standard weight in steelyard.

Q4: longer arm with lighter ball will provided more precise results because longer arm provides more sensitivity which can makes measure small weights.

Q5: its depending on length of steelyard. If one foot steelyard then 100 grams weight can measure up to 500 grams.