determine the mass of a stick w/o a balance?

Question

i have to perform an experiment in which i have tio determine the mass of a stick without a balance. here is the information given: the center of mass of the object is determined by balancing the object on a pivot or fulcrum. a triangular file or something with a thin edge works well for a pivot. the pivot can be supported by 2 cans of beans. mark the center of mass on the object.

Now place the object so that its center of mass is not over the pivot. suspend a known mass from the short end and move the mass until the object balances in a horizontal position.
Since all the mas of the stick can be considered to be at the center of mass, and since the clockwise and counter-clockwise torques are equal, (known weight)(d1)=(weight of stick)(d2)
for a known mass you could use a roll of nickels (20 g) or a peper cup with as many nickels as u want at 5.0 g per nickel.
now can someone please tell me how to setp up this experiment? i dont have anything at home for a pivot any suggestions?

Answer 1

A round chopstick
A Toothpick is the stick is small
A sewing needle if the stick is small
A knitting needle
A knife, but you'll have to be able to hold it so the edge stays pointing up (chewed bubble gum, perhaps)