chapter 15 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter 15 PowerPoint Presentation
Download Presentation
Chapter 15

Loading in 2 Seconds...

play fullscreen
1 / 14

Chapter 15 - PowerPoint PPT Presentation


  • 116 Views
  • Uploaded on

Chapter 15. Energy Assignments 15.1 Math Skills 1-3 p 448; AQs 1-9 p452 15.2 Math Skills 1-3 p 458; AQs  1-6 & 9-10. 15.1 Learning Targets for Energy and its Forms. Describe the relationship between work and energy

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Chapter 15' - frye


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
chapter 15

Chapter 15

Energy Assignments

15.1 Math Skills 1-3 p 448; AQs 1-9 p452

15.2 Math Skills 1-3 p 458; AQs  1-6 & 9-10

15 1 learning targets for energy and its forms
15.1 Learning Targets for Energy and its Forms
  • Describethe relationship between work and energy
  • Calculate the kinetic energy of an object given the objects mass and velocity
  • Analyzehow potential energy is related to an object’s position andgive examples of gravitational and elastic potential energy
  • Solve equations that relate an object’s gravitational potential energy to its mass and height
  • Give examplesof the major forms of energy
mp 1 a 70 0 kilogram man is walking at a speed of 2 0 m s what is his kinetic energy
MP 1.A 70.0-kilogram man is walking at a speed of 2.0 m/s. What is his kinetic energy?
  • KE = ½ m*v2
  • KE = 0.5 * 70.0 kg * (2.0 m/s)2
  • KE = 0.5 * 70.0 kg * 4.0 m/s
  • KE = 140 J
mp 2 a 1400 kilogram car is moving at a speed of 25 m s how much kinetic energy does the car have
MP 2.A 1400-kilogram car is moving at a speed of 25 m/s. How much kinetic energy does the car have?
  • KE = ½ m*v2
  • KE = 0.5 * 1400 kg * (25 m/s)2
  • KE = 0.5 * 1400 kg * 625 m/s
  • KE = 437,500 J
slide5

MP 3.A 50.0-kilogram cheetah has a kinetic energy of 18,000 J. How fast is the cheetah running? (Hint: Rearrange the equation to solve for v.)

  • KE = ½ m*v2
  • 18,000 J = 0.5*50.0 kg*v2
  • 18,000 J = 25*v2 (divide both sides by 25)
  • 720 J = v2 (take the square root of both sides)
  • v = 26.8 m/s
1 describe the relationship between work and energy
1. Describe the relationship between work and energy.
  • Energy is the ability to do work, and work is the transfer of energy
3 what factors determine the gravitational potential energy of an object
3. What factors determine the gravitational potential energy of an object?
  • Its mass
  • The acceleration due to gravity
  • Its height
  • PE = m*g*h
4 give an example of each of the major forms of energy
4. Give an example of each of the major forms of energy.
  • Chemical – wood, gasoline
  • Electrical – ipod
  • Mechanical – bouncing ball
  • Electromagnetic – light
  • Nuclear – nuclear power plants
  • Thermal – molten steel, fire
6 applying concepts what kind of energy is represented by an archer stretching a bow string
6. Applying Concepts  What kind of energy is represented by an archer stretching a bow string?
  • Elastic potential energy
slide12
7. Applying Concepts  Can an object have both kinetic energy and potential energy at the same time? Explain
  • Yes, KE & PE are not mutually exclusive
  • E.g. a falling leaf
slide13

8. A 60.0-kg person walks from the ground to the roof of a 74.8-m-tall building. How much gravitational potential energy does she have at the top of the building?

  • PE = m*g*h
  • PE = 60.0 kg*9.8m/s/s*74.8m
  • PE = 44,000 J
slide14
9. A pitcher throws a 0.145 kg-baseball at a velocity of 30.0 m/s. How much kinetic energy does the ball have?
  • KE = ½ m*v2
  • KE = 0.5*0.145 kg*(30.0 m/s)2
  • KE = 0.5*0.145 kg*900 m/s
  • KE = 65.3 J