1 / 13

Energy Chapter - Work, Energy, and Power

Learn about energy, its different forms including potential and kinetic energy, and how to calculate energy in various scenarios. Explore sample problems and understand the concepts of work, power, and more.

bricker
Download Presentation

Energy Chapter - Work, Energy, and Power

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 12 Work, Energy and Power

  2. Energy • Is the ability to do work • Expressed in Joules (dzuls) • Forms of energy: Mechanical, Heat, light, and Chemical Energy

  3. POTENTIAL ENERGY • Gravitational Energy • Elastic Potential Energy

  4. Gravitational Potential Energy • Is the energy possessed by a body by virtue of its position PE = mgh

  5. Sample Problem 1 • A 75.0kg child climbs a 6.00m long slide. What is the potential energy of the child? Given: m = 75.0kg, h = 6.00m, g = 9.8m/s2 Required: PE = ? Sol’n: PE = mgh = (75kg) (6m) (9.8m/s2) = 4 410 kg m2/s2 = 4 410 J

  6. Sample Problem 2 The potential energy of an apple is 6.00 joules. The apple is 3.00-meters high. What is the mass of the apple? Given: h = 3.00m, PE =6.00 J, g = 9.8m/s2 Required: m = ?

  7. Elastic Potential Energy • Is the energy possessed by a spring or rubber band when it is stretched or compressed

  8. Kinetic Energy • Is the energy possessed by a body because of its motion KE = ½ mv2

  9. Sample Problem 3 What is the kinetic energy of a 2,000 kilogram boat moving at 5 m/s? Given: m = 2,000kg, v = 5m/s Required: KE = ? Sol’n: KE = ½ mv2 = ½ (2000kg) (5m/s)2 = 1000kg (25m2/s2) = 25,000 J

  10. Sample Problem 4 What is the velocity of an 500-kilogram elevator that has 4,000 joules of energy? Given: m = 5,000kg, KE = 4,000 J Required: v = ?

  11. Sample Problem 5 • What is the height of a raised object where its mass is 25kg and the potential energy is 34 J?

  12. Sample Problem 6 What is the mass of an object where its velocity is 25m/s and its kinetic energy is 38.03 J?

More Related