![]() The primary relationship between the two is their ability to transform into each other. You now know that potential energy is position relative, and kinetic energy is motion relative. What Is the Relationship Between Potential and Kinetic Energy? The stationary hammer then has stored energy in the form of potential energy.Īs this example demonstrates, energy is neither destroyed nor lost during the whole process – it’s only altered from one form to another, proving the law of conservation of energy. (It’s the falling hammer that has kinetic energy.) Third, as soon as the hammer hits the table, the energy changes. Second, when you hit the hammer on the table, the stored potential energy is converted to kinetic energy as the hammer is falling. There are three interesting things you should note here.įirst, the raised hammer has more potential energy since it has the potential to go higher or lower. But as you drop the hammer downwards to bang on a table’s surface, it’ll have kinetic energy. When you raise the hammer higher, it’ll have potential energy. Let’s explain P.E and K.E with the help of an example. Kinetic energy can be transferred from one moving object to another (vibration and rotation) and is dependent on an object’s spee d or v elocity and mass. Potential energy isn’t transferrable and it depends on the height or distance and mass of the object. For instance, the kinetic energy of the object will be higher if the object is placed at a greater height. Contrary to potential energy, the kinetic energy of an object is relative to other stationary and moving objects present in its immediate environment. On the other hand, kinetic energy is the energy of an object or a system’s particles in motion. However, it isn’t affected by the environment outside of the object or system, such as air or height. Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. Potential energy can be converted to kinetic energy and vice versa. Potential and kinetic energy are two forms of energy that can be converted into each other. You need energy to do any work, which is why the ability to do any work is energy. What Is Potential and Kinetic Energy and What Are Their Differences? Read on as we discuss these two energy forms in greater detail and explore the relationship between them. Whenever you use or store energy, you deal with potential or kinetic energy. It can neither be created nor destroyed, but it can be altered. (a) What is the kinetic energy of an 80-kg athlete, running at 10 m/s? (b) The Chicxulub crater in Yucatan, one of the largest existing impact craters on Earth, is thought to have been created by an asteroid, traveling atĢ2 km/s and releasing 4.2\times, and solve for v.Energy is a fascinating concept. Since objects (or systems) of interest vary in complexity, we first define the kinetic energy of a particle with mass m. ![]() At speeds comparable to the speed of light, the special theory of relativity requires a different expression for the kinetic energy of a particle, as discussed in Relativity in the third volume of this text. Note that when we say “classical,” we mean non-relativistic, that is, at speeds much less that the speed of light. With this history in mind, we can now state the classical definition of kinetic energy. ![]() (If you have ever played billiards or croquet, or seen a model of Newton’s Cradle, you have observed this type of collision.) The idea behind this quantity was related to the forces acting on a body and was referred to as “the energy of motion.” Later on, during the eighteenth century, the name kinetic energy was given to energy of motion. The first body stops, and the second body moves off with the initial velocity of the first body. At the end of the seventeenth century, a quantity was introduced into mechanics to explain collisions between two perfectly elastic bodies, in which one body makes a head-on collision with an identical body at rest. This does not depend on the direction of the velocity, only its magnitude. It’s plausible to suppose that the greater the velocity of a body, the greater effect it could have on other bodies.
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