Archimedes Principle and Buoyancy

[Lisas941]

Homework Statement

A 100g object having a density less than that of water is placed into a beaker half full of water. The beaker is then placed on a triple beam balance. Would be measured weight be equal to, greater than, or less than the weights of the water, the beaker, and the object added together? Explain.

Homework Equations

Fb = ρVg = mf g
Wapt = mg - Fb

The Attempt at a Solution

Would it be equal to as the balance isn't affected by the buoyant force within the beaker? I'm confused.

 

[td21]

your attempt is reasonable enough, but Newton's third law would be helpful.