College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 28

A uniform meterstick pivoted at its center, as in Example 8.5, has a 100-g mass suspended at the 25.0-cm position, (a) at what position should a 75.0-g mass be suspended to put the system in equilibrium (b) What mass would have to be suspended at the 90.0-cm position for the system to be in equilibrium