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

Intro Explore the "Intro" section of the Balancing Act simulation. Learn what every button does, how to place objects on the bar, and how to remove the supports. Also try to balance the bar with objects on it at a variety of locations. (This exploration should take 10-15 minutes.) 1. Is there more than one way to get two objects with identical masses to balance? Explain. 2. Next, try to get two objects with different masses to balance. Below, draw 2 different configurations in which the system was balanced with two objects of different masses. Make sure you label the masses and the distance to each mass from the center (the pivot point). (The distance a mass is located away from the pivot point is often referred to as the "lever arm" or "moment arm") 1. 2. 3. Conclusion Question: What did you learn from the activity above? Carefully explain your answer using well-written complete sentences.Balance Lab (Part 1) Explore the "Balance Lab" section of the Balancing Act simulation. 4. Create a situation in which the beam is balanced (without the supports) while there is a single collection of bricks on one side of the pivot and two different collections of bricks on the other side (3 collections of bricks in total in the experiment). Draw the situation on the figure below while making sure to label the masses and the distance to each mass from the center (pivot point). 5. Turn the picture above into an extended free-body diagram. . In the picture above, draw in the forces pushing downward on the beam due to the weight of each collection of bricks from each mass. Label the forces with the symbols wi, wz, and wi. (Note that there is a checkbox in the program for "Forces from Objects" that can help you with this step.) Next, draw the weight of the beam at its "center of mass" which should be at its center if the beam is uniform. Consider the beam to have a mass of 10 kg to help you draw the size of the arrow. Label the force with the symbol whenm. Lastly, draw the upward normal force exerted on the beam by the hinge at the pivot point that serves to counterbalance all of the downward weight forces. Label the force with the symbol n. 6. Calculate Torques: Fill in the table below. . Start by listing the downward force exerted on the beam due to the weight of each object (treat g=10 m/s-). Next, record the "lever arm" (distance from pivot) for each object. . Next, calculate the magnitude of the torque exerted by each object about the pivot by noting that it is equal to the product of force and lever arm. Lastly, include the appropriate sign for each torque in the table by noting that torques which attempt to rotate bodies counterclockwise are usually treated as positive, while those that try to rotate the system clockwise are treated as negative.'1'. Conclusion Question: Carefully coneidera 1| orthe calculated torques in your table. Whatcan you conclude from your reeults'? W aarewexpanimr complete sentences. --_ \"1- 8. Conclusion Question: What would you have to change about the experiment in order for the weight of the beam to generate torque about the pivot point? Carefully explain your answer. 9. Conclusion Question: What is the magnitude of the normal force exerted by the hinge on the beam in your experiment? Show your work and explain your answer.