DOIT 5 Ruler Balance Scale - example of rotational equilibrium

MATERIALS : A cheap diet scale

a plastic or wood ruler with a center hole and mm, cm scale.

Thread or very light string

Weights - nail polish bottles, whiteout bottles, bottles of seasonings, nial clippers, pens, pencils and similar items.

INSTRUCTIONS:


SAMPLE DATA SHEET (first two trials)

Trial

number

w1

(kg)

R1

(m)

1 =w1*R1

w2

(kg)

x2

(m)

2 = w2*R2

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