Simulation: https://phet.colorado.edu/en/simulation/balancing-act Learning Objectives: 1. Describe the factors that determine whether two objects will balance each other

2. Predict how changing the position of a mass on the balance will affect the motion of the balance

3. Use a balance to the find the masses of unknown objects

4. Draw extended free-body diagrams

30 kg 20 kg Show Mass Labels Forces from Objects Level Position None Rulers Marks Bricks 5 kg 10 kg 15 kg 20 kg Balancing Act PHET= Intro Balance Lab Game