Name: Date: Block Introduction to Conservation of Energy According to the law of conservation of energy, "In a closed system, the total energy of an object remains constant (TOT E never changes), however the types of energy can change-one form of energy can be transformed into other forms of energy". In the following scenarios, gravity is affecting the moving objects and friction is zero. TOT E remains constant but the proportions of GPE and KE change. . Total Energy = Gravitational Potential Energy + Kinetic Energy = 100% . The percentage of GPE and KE can change as object moves down or up, but the total energy remains constant. . Assume no friction (loss of energy by heat) 1. Conservation of Energy of a Freefalling Object. A ball is initially suspended above the ground at position A. The ball is released, it freefalls from position A to position F. At position A F, the ball impacts the ground. Answer the questions about the conversion of GPE to KE as the ball freefalls to the ground. Air resistance is absent. Choose the best answer that describes the energy relationship of the falling ball At Position A, TOTAL ENERGY - . 100% GPE +0 KE C. 50% GPE + 50%% KE E. GPE KE : C 2. At Position B, TOTAL ENERGY - A. 100% GPE + 0 KE C. 50% GPE + 50% KE E. GPE KE IE . At Position C, TOTAL ENERGY = A. 100% GPE + 0 KE C, 50% GPE + 50%% KE E. GPE KE 4. At Position D, TOTAL ENERGY - A. 100% GPE + 0 KE C. 50% GPE + 50% KE E. GPE KE 5. At Position E, TOTAL ENERGY- A. 100% GPE + 0 KE C. 50% GPE + 50% KE E. GPE KE 6. At Position F, TOTAL ENERGY - A, 100% GPE +0 KE C. 50% GPE + 50% KE E. GPE KE Date: Block: Name: Follow Up Questions A. Describe the ball's motion at Position A (point of release). B. Describe the ball's motion at Position F (impact) C. The ball's total energy is 100% KE at because D. The ball's total energy is 50% GPE and 50% KE at because