When two objects interacting through a force field change relative position, the energy stored in the force field is changed. Each force between the two interacting objects acts in the direction such that motion in that direction would reduce the energy in the force field between the objects. However, prior motion and other forces also affect the actual direction of motion. When two objects interact, each one exerts a force on the other. These forces can transfer energy between the objects.
Forces between two objects at a distance are explained by force fields gravitational, electric, or magnetic between them. Contact forces between colliding objects can be modeled at the microscopic level as due to electromagnetic force fields between the surface particles. When two objects interacting via a force field change their relative position, the energy in the force field between them changes. For any such pair of objects the force on each object acts in the direction such that motion of that object in that direction would reduce the energy in the force field between the two objects.
Patterns of motion, such as a weight bobbing on a spring or a swinging pendulum, can be understood in terms of forces at each instant or in terms of transformation of energy between the motion and one or more forms of stored energy. Elastic collisions between two objects can be modeled at the macroscopic scale using conservation of energy without having to examine the detailed microscopic forces.
That stretching involves work and increases the potential energy. You can flatten a solid rubber ball and it will want to bounce back up. You can also pull the drawstring of a bow and the work done stores the energy that can make the arrow go flying. Those are all examples of your putting energy in, and then something happening when the energy comes out. Gases Storing Energy Gases? What can they do?
Gases are great because they can compress and expand. They act as if they were elastic. If the pressure increases and compresses gas molecules, the amount of stored energy increases.
It's similar to a spring, but slightly different. Eventually that energy in the compressed gas can be let out to do something work. In your car, there are shock absorbers. Some shocks have compressed gas in the cylinders rather than springs. The energy in those cylinders keeps your car from bouncing too much in potholes. Think about wind. Wind is caused because of pressure differences in the atmosphere. When the wind blows it can do anything - turn windmills, help birds fly, make tornadoes, and do all types of work.
Given descriptions, illustrations, graphs, charts, or equations, students will demonstrate and calculate how unbalanced forces change the speed or direction of an objects motion. Changes in Motion Texas Gateway www. Given diagrams or scenarios, students will measure and graph changes in motion. Potential and Kinetic Energy Texas Gateway www.
Average Speed Texas Gateway www. Given diagrams, data, or scenarios, students will calculate average speed using distance and time measurements. Flocabulary Energy. Energy - Kinetic Energy - Photosynthesis - Flocabulary www. Learn about energy and photosynthesis with Flocabulary's educational rap song and lesson plan. Flocabulary Force and Motion. Brainpop Videos can be found in the two links below:.
Brainpop Username: kilgoremiddle Brainpop Password: pop1. Potential and Kinetic Energy. Hoodwinked Energy. YouTube www. Vocabulary words for Potential energy may be transformed converted into kinetic energy. Kinetic may be transformed into potential energy. Use these cards to study the way this happens.. Includes studying games and tools such as flashcards. This interactive roller coaster ride produced by WGBH illustrates the relationship between potential and kinetic energy.
As the coaster cars go up and down the hills and around the loop of the track, a pie chart shows how the relative transformation back and forth between gravitational potential energy and kinetic energy.
Welcome to Amusement Park Physics www. Simulations www. Energy Match Up flashcards Quizlet quizlet. Vocabulary words for Energy Match Up. Energy Skate Park phet. Learn about conservation of energy with a skater dude! Build tracks, ramps and jumps for the skater and view the kinetic energy, potential energy and friction as he moves. You can also take the skater to different planets or even space! Balanced and Unbalanced Forces. Forces and Motion: Basics phet.
Explore the forces at work when pulling against a cart,and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.
Ramp: Forces and Motion phet. Explore forces and motion as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces. Graphs show forces, energy and work. The Ramp phet. Explore forces, energy and work as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces acting on the file cabinet.
Flocabulary Motion. Learn all about the laws of motion and Isaac Newton with Flocabulary's educational rap song and lesson plan. What is speed? Speed Flashcards Quizlet quizlet. Start studying Speed.
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