An ideal meter stick is balanced on a pencil which is at the 60 cm mark. A 6 gram mass sits at the 90 cm mark. What is the mass of the meter stick?

Again, I have the answer and it is 18g. I have no clue where to even begin with this questions. Thank you in advance.

2 answers

the center of mass of the stick is at the 50 cm mark ... 10 cm from the balance point

the 6 g is 30 cm from the balance

10 * m = 30 * 6
asfgrgggggggggggs