(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Three children are trying to balance on a seesaw, which includes a fulcrum rock acting as a pivot at the center (x = 0), and a very light board 5.2 m long (see figure). Two playmates are already on either end. Boy A has a mass of 50 kg, and boy B a mass of 35 kg. Where should girl C, whose mass is 25 kg, place herself so as to balance the seesaw?

http://www.webassign.net/gianpse4/12-57.gif

2. Relevant equations

3. The attempt at a solution

(45kg)(9.8m/s^2)(-2.6m)-(35kg)(9.8m/s^2)(2.6m)+(25kg)(9.8m/s^2)(x)

-1146.6N*m-891.8N*m+245N(x)

-2038.4N*m=-245N(x)

x=8.32m which is clearly not correct....please help!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: 3 children and a balancing a seesaw

**Physics Forums | Science Articles, Homework Help, Discussion**