Expirement - Principle of moments?

Question

Describe an expirement you could counduct to determine the mass of a half metre ruler using the principle of moments.

Also state materials/ equipments used, result to be taken and how you would use these results to arrive at the mass of the ruler.

Answer 1

Start by getting a fulcrum and finding the center of mass point (balancing point).

Now we will assume the density of the ruler is uniform.

Next, get a .1 gram mass and place the ruler 10 cm to the east. Find where the .1 gram mass balances the ruler on the short (west) end as measured from the balance fulcrum in cm, call this d.

So
d*.1=m*10
m=d*.1/10

For accuracy, move the fulcrum to a few other positions and recalculate.

Also, try another weight and recalculate. The average is the average m. Note that g is not part of the equation.

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Answer 2

Yes, it's true mush has been said about it. lol Lot's of good stuff too ... even God talks about how the flowers in the field don't worry about tomorrow yet are arrayed more beautifully than Solomon in all his glory. However, making important decisions for your life require thought, which means considering the past, looking towards the future and planning for those you love.