![]() ![]() No third law was injured or killed in this comment, names were withheld to protect the guilty. Steps to Calculate the Final Velocity of an Object Using Work-Energy Theorem Step 1: Identify the mass of the object. Divide the work done, W, by the applied force, F. Hence, to calculate the distance from force and work, proceed as follows: Determine the work done, W, when the force, F, is applied. Suction is the pushing towards you, and pushing is the pushing away from you. Even though the application of conservation of energy to a falling object allows us to predict its impact velocity and kinetic energy, we cannot predict its. The formula for calculating work is Work Force x Distance. In other words, at the initial starting point in the middle of nowhere in the universe, at the final time of reaction, if you were to go where the initial reaction occurred, you would find zero mass and or energy and not your rocket with the gas and oxygen sucked out instantly by the abstract mislead concept of a vacuum as nothing sucks. The math you requested: (Rocket mass and Energy) - (gas mass and Energy) = 0. Velocity of Electrons: Newtonian: Einsteinian: Difference: Unit: m/sec. The flat Earth Society claim to have members all over the "globe". Lastly, if you don't want to hear Newton's third law then there is no sense of talking about a spherical world. ![]() There is nothing in our universe that reacts instantly as that would get a speeding ticket for going faster than the speed of light speed limit,not to include the things that are already travelling faster than the speed of light as they would get a slowing ticket for going past, or below the speed of light, starting at the Planck scale. Nice question, but incomplete, you forgot to add gravity, which there is no place in our universe with zero gravity as gravity is a field, also, the addition of time. If anyone can answer how propulsion happens in the ever expanding vacuum of space using rocket technology with math that does not conflict with the PV work formula I would like to hear the answer. free expansion therefore no gas will acculmate at the nozzle to push off or react upon as I have heard some space agencies claim. If burnt gasses come out of the nozzle (action) they will be obsorbed by the infinite vacuum of space A.K.A. We define this to be the gravitational potential energy (PEg)put into (or gained by) the object-Earth system. If fuel and oxygen are mixed in the combustion chamber and somehow ignited the laws of free expansion eliminate any work from being performed and therefore no thrust happens because there is no external resistance/pressure to get an opposite and equal reaction from. The work done on the mass is then W Fd mgh. If I am wrong than so is the P V work formula, and please don't throw Newton's third law as an answer, without explaining where the reaction comes from because pushing off nothing makes no sense, and in a vacuum the gasses are subject to free expansion. My conclusion is rockets can not produce thrust in the supposed vacuum of space, because there is no resistance/pressure to work on. The work done by friction is negative because the force of friction opposes the car’s displacement and the car is losing kinetic energy.If oxygen and a combustible fuel are mixed in a combustion chamber that is in equilibrium with the ever expanding vacuum of space how can any work be done? W = P ext is 0 X any number for change in volume = zero, because any number muitiplied by zero is zero, therefore 0 work is performed. The work-energy theorem is expressed by the following equation: Work-Energy Theorem Thus, the car’s kinetic energy decreases and the amount of energy it loses is equal to the work done by friction. For example, when a car brakes, the force of friction does negative work on the car and causes the car to slow down. If the work done on the system is negative, the kinetic energy of the system will decrease. ![]() If the work done on the system is positive, the kinetic energy of the system will increase. Both work and energy also have the same units of Joules (J). When work is done on a system, the amount of energy in the system increases or decreases by an amount equal to the work. Work and energy are directly related to each other with work being equal to the change in energy. In physics, power (P) is a scalar quantity, which is the amount of energy. Interested in an Albert school license? How Work and Energy are Related An online work calculator that allows you to determine the work, power, force. ![]()
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