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Generally Confused
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When using the work-energy theorem (Wnet=ΔE), when do you take gravitational potential energy into account? Change in energy implies all types of energy involved, but in what cases would PEg be a part of it?
Generally Confused said:When using the work-energy theorem (Wnet=ΔE), when do you take gravitational potential energy into account? Change in energy implies all types of energy involved, but in what cases would PEg be a part of it?
This is word-for-word what we are learning in my beginner´s physics class. Although it may not exactly be correct, does anyone have an answer under these circumstances? This all we learned on the topic at this point.Generally Confused said:When using the work-energy theorem (Wnet=ΔE), when do you take gravitational potential energy into account? Change in energy implies all types of energy involved, but in what cases would PEg be a part of it?
The Work-Energy Theorem states that the work done on an object by a net force is equal to the change in the object's kinetic energy. In other words, the work done on an object will result in a change in its speed or velocity.
The Work-Energy Theorem can also be applied to an object's gravitational potential energy (GPE). When an object is lifted against gravity, work is done on the object and its GPE increases. Similarly, when an object falls, its GPE is converted into kinetic energy as it gains speed.
The formula for calculating GPE is GPE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object relative to a reference point.
Yes, GPE can be negative if the reference point is chosen to be at a height lower than the object's initial position. In this case, GPE is calculated as GPE = mgh, where h is a negative value.
The Work-Energy Theorem is useful in understanding and predicting the behavior of objects in various real-life situations, such as in the design of roller coasters, calculating the speed and acceleration of moving objects, and analyzing the efficiency of machines. It also helps in understanding the concept of conservation of energy, as the total work done on an object is equal to the change in its energy.