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Balancing a Teeter-Totter with Forces and Energy Concepts

In this problem, we analyze a teeter-totter with three children of varying weights and positions. On the left, a 75 lb child sits 3 ft from the fulcrum, and a 100 lb child sits 6 ft away. On the right, a 50 lb child is positioned 5 ft from the fulcrum. To achieve balance, we need to find the position for a 110 lb child. This scenario introduces energy concepts and the principles of levers and torque, emphasizing the conservation of energy. Complete the corresponding crossword puzzle to deepen your understanding of kinetic and potential energy.

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Balancing a Teeter-Totter with Forces and Energy Concepts

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  1. Draw a diagram and solve the following problem… A teeter totter has three children on it. On the left side, there are a 75lb and a 100lb child sitting 3ft and 6ft from the fulcrum, respectively. On the right side, there is a 50lb child sitting 5ft from the fulcrum. Where can a 110lb child sit to balance the teeter totter evenly? DO NOW:

  2. Introduction to Energy Aim: What is energy? Where does it come from and where does it go?

  3. What is energy? • Where have you SEEN energy being used or being stored? Energy

  4. “Energy is the ability to do work.” Energy

  5. Two categories of energy: • Kinetic Energy – energy being used (energy DOING work) • Potential Energy – stored energy (energy with POTENTIAL to do work) Where does energy come from?

  6. Energy is never created (except that one time… the Big Bang…) • Energy is never destroyed • When energy appears to be “used up” it is because it changes from one form to another… • Example: The chemical energy from corn is “used” as mechanical energy to help you move…. • Once you move the rock up the hill, the mechanical energy you “used” to get it up there is being stored as potential energy… When we use energy, where does it go?

  7. ENERGY IS CONSERVED… We have the same amount of ENERGY in the universe at all times. BIG POINT…

  8. To learn about the different types of kinetic and potential energy in the universe, use the website below to complete the crossword puzzle on ENERGY. http://www.fi.edu/guide/hughes/energytypes10.html Your task…

  9. Complete the crossword puzzle. • QUIZ THURSDAY on Levers, Torque and Types of Energy Homework

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