Potential and Kinetic Energy

Intro Videos to watch Take a look at these videos Work/zX707f5b60615d a.htm Work/zX707f5b60615d a.htm AndAnd Work/zX66525f a555e680a.htm Work/zX66525f a555e680a.htm Now go through the rest of this slide show to learn more about Potential and Kinetic EnergyNow go through the rest of this slide show to learn more about Potential and Kinetic Energy

How is all energy divided? Potential Energy Kinetic Energy All Energy Gravitation Potential Energy Elastic Potential Energy Chemical Potential Energy

What is Potential Energy? oEnergy that is stored and waiting to be used later

What is Gravitational Potential Energy? oPotential energy due to an object’s position oP.E. = mass x height x gravity height x gravity Don’t look down, Rover! Good boy!

What is Elastic Potential Energy? oPotential energy due compression or expansion of an elastic object. Notice the ball compressing and expanding

What is Chemical Potential Energy? oPotential energy stored within the chemical bonds of an object

What is Kinetic Energy? oEnergy an object has due to its motion oK.E. =.5(mass x speed 2 )

Now your turn! Click on this website then click on and answer the questions on this page about the rollercoaster before clicking play. What numbers on the rollercoaster represent where the potential energy would be the greatest? The kinetic energy the greatest? The potential energy the least? The kinetic energy the least? Step

Click Play and watch the rollercoaster go! Were you correct in your predictions? What was the rollercoaster doing every time the potential energy was very high? Sitting still or moving? What was the rollercoaster doing every time the kinetic energy was very high? Sitting still or moving?

Let’s look at another example When the pendulum is at the top of its swing A, which is the greatest? Potential or Kinetic Energy What about the bottom of its swing B? What about half way between the top and the bottom C? A B C A

How about Chemical Potential to Kinetic Energy Is the energy in the battery Potential or Kinetic Energy? When you place the battery in the flashlight is the energy in the battery Potential or Kinetic Energy? When you turn the switch of the flashlight on, the energy in the battery is converted from ____________________ Energy to ________________Energy in the form of ____________ and __________.

How about a spring? Where is the energy stored ( the potential energy) in this clip? The transfer of potential energy to kinetic energy causes what action? At what letter on the clip above is kinetic energy the greatest? A B

Now we know! Energy is either stored or moving! When it is stored it is potential energy! When it is kinetic it is moving! Take a look at these videos Work/zX707f5b60615d a.htm Work/zX707f5b60615d a.htmAnd Work/zX66525f a555e680a.htm Work/zX66525f a555e680a.htm