Into a lower energy state, or they might bond with other Gonna have bonds like this, that actually store energy in them, they have the potential to be released, if you're able to break these bonds, those electrons are gonna get Wood or charcoal of some kind, but these are formedīy carbon-carbon bonds, so you have these carbon-carbon bonds and they could be bonded to other carbons or other things and they'reĪlso going to be bound to some hydrogens here and there, so you're gonna have, you're Most of the energy is and that's potential energy, so where is the potential energy? Well, it's sitting in theīonds of the fuel over here, so these are either chips of The energy in the system," but I'll say no, there'sĪnother form of energy and actually even in this picture, that's probably where Now you might say, "Okay, maybe that's all of That's the reason why we can see this fire, You also have light being emitted, that has energy as well, weĬall that radiant energy, so that light being emitted, ![]() They have higher kinetic energy and so the temperature goes up, their average kinetic energy goes up, so thermal energy is really aįorm of energy due to movement and the general term forĮnergy due to movement is kinetic energy, so thermalĮnergy is really a form of kinetic, kinetic, kinetic energy. Reaction going on, they're getting excited and Little molecules here, because of the combustion Hot, so thermal energy, but we should think about what is thermal energy fundamentally? A system's temperature is really about the average kineticĮnergy of its molecules, so thermal energy is reallyĪbout the energy of movement, it's really about all these Obvious forms of energy, we have some thermal energy, fires are definitely So if we look at the fire here, there's some maybe Identify the forms of energy and then think about how they can relate to actually doing work. Now let's look at these pictures here, which are depictingĭifferent forms of energy and let's see if we can Has been performed here by moving this, so we'veĭone something here and this is considered toīe work, 100 joules of work, if we move this twice as far, then it would be 200 joules of work and so energy is the ability Work and newton meters, that has been defined as the joule, which is the unit of workĪnd also the unit of energy, so this is the same thing as 100, I could write it out as joules, 100 joules or we could just abbreviate it with a J, so 100 joules of work Newton meters of work, 100 newton meters, 'cause you're multiplying Would be equal to 100 and then the units are That has been performed would be 10 newtons times 10 meters and so 10 times 10, it Object to be displaced in the direction of that force, you would say that work has been performed and the amount of work It, let's say 10 meters, so after you've done it, the object, the object is right over here, so when you do this, you apply a force and it's causing the The right on this object and by doing that you'reĪble to move the object, you're able to displace the object in the same direction as that force, so you're able to displace Those videos on Khan Academy, but you apply a force to You, don't worry too much, but you can also review it on Have some object here and you were to apply a force, you were to apply aįorce in that direction and the magnitude of thatįorce, let's say it's 10 newtons and if the units, newtons in force isn't too familiar to Work, where you go to your job and you work nine toįive and you get paid, work in a physics context is a little bit, it's not completely unrelated to our everyday notion of work, but I'll give you an example just to get a better idea of it, so let's say that you ![]() ![]() Gonna put work in quotes, because the notion of work here isn't the everyday notion of The ability to do work, ability to do and I'm Things that are moving or hot or bright as being energetic, but what I wanna talk about in this video is a more formal definition of it, a more scientific definitionĪnd the most typical one, that's often given is Meaning in our everyday life, if we kind of imagine The notion of energy and energy definitely has some Of the most fundamental ideas in science and that is
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