Question

B1 has a mass of 90kg, and B2 has a mass of 60kg. They are both sitting on a seesaw. If B1 is seated 10m away from B2, how far should each be from the fulcrum of the seesaw?

a) Illustrate the diagram

Answer 1

$$m _ 1 ​ x _ 1 ​ =m _ 2 ​ x _ 2\\ ​ x _ 1 ​ +x _ 2 ​ =l\\ 90x _ 1 ​ =60(10−x _ 1 ​ )→ x _ 1 ​ =4 m,x _ 2 ​ =10−6=6 m$$