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Energy

This article explores the concepts of potential and kinetic energy, fundamental principles in physics. We define potential energy as the energy of position and provide the formula PE = mgh, where m is mass, g is acceleration due to gravity (9.8 m/s²), and h is height. Using a scenario involving a mass of 3,000 kg at a height of 28.3 m, we calculate potential energy. We also discuss kinetic energy as the energy of motion, represented by the formula KE = 1/2 mv², and the law of conservation of energy. The relationship between work and energy is highlighted with practical examples.

noelle-richardson
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Energy

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  1. Energy

  2. Energy is . . . the ability to do work

  3. Potential Energy

  4. Potential Energy is…... • Energy of position • Stored energy

  5. Formula PE = mgh Potential Energy = mass ( 9.8 m/s2) height

  6. Statistics • Height (m): 28.3 • Mass (kg): 3,000 Calculate the potential energy of the first hill.

  7. Kinetic Energy

  8. Kinetic Energy is … Energy of Motion

  9. Formula KE = 1/2 mv2 Kinetic Energy = 1/2 (mass) (velocity)2

  10. Law of Conservation of Energy

  11. PE = KE Potential Energy = Kinetic Energy

  12. What is the kinetic energy at the bottom of the first hill?

  13. Work

  14. Work = Fd Force (Distance)

  15. Work = PE work = potential energy

  16. Work = mgh Work = (mass) (9.8 m/s2) (height)

  17. Fd = mgh (Fd) = (mass) (9.8 m/s2) (height)

  18. Raising the cart to the top of the first hill requires how much work?

  19. Statistics • Length (m): 969.3 • Height (m): 28.3 • Drop (m): 24.4 • Speed (kph) 104.6 • Duration (sec): 135.0 • Angle of Descent (degrees): 53.0

  20. Background Information • Made from Douglas Fir • 40,000 board feet of lumber delivered by rail and truck • Wood treated with Chemonite process • 10,000 gallons of paint to dip wood and paint the entire structure • 750 cubic yards of concrete • 14,000 linear feet of rail • 25 tons of steel

  21. Demographics • Type: Wooden • Status: Operating since 6/12/1976 • Designer: William Cobb • Builder: William Cobb & Associates

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