Solution Found!
Three children are trying to balance on a seesaw, which
Chapter 3, Problem 16P(choose chapter or problem)
Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board 3.6 m long (Fig. 9–50). Two playmates are already on either end. Boy A has a mass of 50 kg, and girl B a mass of 35 kg. Where should girl C, whose mass is 25 kg, place herself so as to balance the seesaw?
Questions & Answers
QUESTION:
Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board 3.6 m long (Fig. 9–50). Two playmates are already on either end. Boy A has a mass of 50 kg, and girl B a mass of 35 kg. Where should girl C, whose mass is 25 kg, place herself so as to balance the seesaw?
ANSWER:
Step 1 of 2
The following are given by the question:
The total length of the board, 
The mass of boy A, 
The mass of girl B,
The mass of girl C,
Let’s assume that the girl C placed at distance of x from the center and take torques positive in clockwise direction.
Torque 
