It can be calculated with the equation:Ĭonsider the diver in Figure above. Gravitational potential energy depends on an object’s weight and its height above the ground. For example leaves on trees have potential energy because they could fall due to the pull of gravity.Īll three of these people have gravitational potential energy. An object has potential energy because of its position or shape. Instead, they have stored energy, called potential energy. While they are still attached to the trees they also have energy, but it’s not because of motion. As the leaves are falling, they have kinetic energy. The leaves turn color and then fall from the trees to the ground. ![]() How much kinetic energy does he have if he runs at a velocity of 2 m/s? Potential Energyĭid you ever see a scene like the one in Figure below ? In many parts of the world, trees lose their leaves in autumn. Problem: Juan’s dad has a mass of 100 kg. Problem: What is Juan’s kinetic energy if he runs at a velocity of 4 m/s? ![]() If he is running at a velocity of 2 m/s, how much kinetic energy does he have? You can see for yourself how mass and velocity affect kinetic energy by working through the problems below. That’s because velocity is squared in the equation. But if velocity doubles, kinetic energy increases by a factor of four. For example, if mass doubles, kinetic energy also doubles. This equation for kinetic energy shows that velocity affects kinetic energy more than mass does. The kinetic energy of a moving object can be calculated with the equation: An object with greater mass or greater velocity has more kinetic energy. The amount of kinetic energy in a moving object depends on its mass and velocity. For more examples, let Tim and Moby be your guide at: Use your school login and password information.Īll of these photos show things that have kinetic energy because they are moving. For example, the hammer in the photo is doing the work of pounding the nail into the board. Anything that is moving has kinetic energy - from the atoms in matter to the planets in solar systems. Kinetic energy is the energy of moving matter. What do all the photos in Figure below have in common? All of them show things that are moving. Mechanical energy is the energy of objects that are moving or have the potential to move. Kinetic and potential forms of mechanical energy are the focus of this lesson. Most forms of energy can also be classified as kinetic or potential energy. Some forms of energy are mechanical, electrical, and chemical energy. Where does the batter get her energy?Įnergy exists in different forms, which you can read about in the lesson "Forms of Energy" later in the chapter. CK-12 intends to pioneer the generation and distribution of high-quality educational content that will serve both as core text as well as provide an adaptive environment for learning, powered through the FlexBook Platform®.Ĭopyright © 2014 CK-12 Foundation, The names "CK-12" and "CK12" and associated logos and the terms " FlexBook®" and " FlexBook Platform®" (collectively "CK-12 Marks") are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws.Īny form of reproduction of this book in any format or medium, in whole or in sections must include the referral attribution link (placed in a visible location) in addition to the following terms.Įxcept as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the Creative Commons Attribution-Non-Commercial 3.0 Unported (CC BY-NC 3.0) License ( ), as amended and updated by Creative Commons from time to time (the "CC License"), which is incorporated herein by this reference. Using an open-content, web-based collaborative model termed the FlexBook®. ![]() ![]() CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S.
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