* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Study Vocabulary for Objects in Motion
William Flynn Martin wikipedia , lookup
Dark energy wikipedia , lookup
Open energy system models wikipedia , lookup
Energy storage wikipedia , lookup
Energy subsidies wikipedia , lookup
100% renewable energy wikipedia , lookup
Low-Income Home Energy Assistance Program wikipedia , lookup
Work (physics) wikipedia , lookup
Zero-energy building wikipedia , lookup
Public schemes for energy efficient refurbishment wikipedia , lookup
Low-carbon economy wikipedia , lookup
World energy consumption wikipedia , lookup
Alternative energy wikipedia , lookup
Regenerative brake wikipedia , lookup
Energy Charter Treaty wikipedia , lookup
Kinetic energy wikipedia , lookup
Gibbs free energy wikipedia , lookup
International Energy Agency wikipedia , lookup
Energy policy of the United Kingdom wikipedia , lookup
Energy harvesting wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Distributed generation wikipedia , lookup
Energy returned on energy invested wikipedia , lookup
Internal energy wikipedia , lookup
Energy policy of Finland wikipedia , lookup
Potential energy wikipedia , lookup
Energy efficiency in transport wikipedia , lookup
Energy in the United Kingdom wikipedia , lookup
Negawatt power wikipedia , lookup
Energy policy of the European Union wikipedia , lookup
United States energy law wikipedia , lookup
Conservation of energy wikipedia , lookup
Energy efficiency in British housing wikipedia , lookup
Energy Independence and Security Act of 2007 wikipedia , lookup
Objects In Motion Vocabulary Words Types of Energy Definitions Renewable Energy Resources are natural resources that can replenish themselves over time. Non-Renewable Energy Resources are natural energy resources that exist in limited supply and cannot be replenished in a timely manner Sources of Energy Energy A measurement of an object's ability to do work. Work Work is defined as applying a force in order to move an object in a given direction. Note- Work can only be done to a system by an external force +More work that is done by an object, the more energy it exerts. +Since energy is equal to work, the unit for both is the same, the Joule (J). 1 Joule = 1 Newton-mete The amount of work done is the change in the amount of energy that the system will Work Equation experience. This is given by the equation: Objects In Motion Vocabulary Work Types of Work Definitions +Positive If the object moves in the same direction as the direction of the force. Ex-Pushing a desk across the room. +Negative If the object moves in the direction opposite the direction of the force. Ex-Pushing at a rock & it does move. Kinetic Energy Dependent On + Mass & velocity. Speed The speed of an object over a distance. Ex.-35mph Velocity The speed & direction of an object. Ex.-40 mph East Calculating Kinetic Energy Kinetic Energy Problem A car, which has a mass of 1,000 kg, is moving with a velocity of 5 m/s. How much Kinetic Energy does the car possess? Potential Energy Forms Gravitational—is energy stored based on where the object is located. +Greater height—more gravitational potential energy. +Lower height—less gravitational potential energy. Elastic Energy—is energy stored when something is stretched. Once you release the stretched object, the energy is released. Ex—Rubber bands Objects In Motion Vocabulary Word Gravitational Potential Energy Influenced By Calculating Gravitational Potential Energy Example - Calculating Gravitational Potential Energy Definition Mass, gravity, and height. GPE = mgh A basketball, who’s mass is 0.5 kg, is held at a height of 2 m above the ground. GPE = mgh GPE = (0.5 kg)(9.8 m/s2)(2 m) GPE = 9.8 J Elastic Potential Energy Determined By +The elasticity of the material +How far it is stretched or compressed. Calculating Elastic Potential Energy EPE = Elastic Potential Energy (J) k = spring constant (N/m) x = distance of stretch or compression (m) Example - Calculating Elastic Potential Energy A spring, which has a spring constant of 10 N/m, is stretched a distance of 1 m. EPE = kx2 EPE = ( )(10 N/m)(1 m)2 EPE = ( )(10 N/m)(1 m2) EPE = (5 N*m) EPE = 5 J Mechanical Energy The total energy possible is the Potential Energy (PE) and the Kinetic Energy (KE) added together. (PE + KE)i = (PE + KE)f Objects In Motion Vocabulary Work Mechanical Energy Definition The total energy possible is the Potential Energy (PE) and the Kinetic Energy (KE) added together. (PE + KE)i = (PE + KE)f Conservation of Energy If the amount of energy that we start with "Ei" and the amount we end up with as "Ef" then we would say that if no energy is added to or taken away—energy conservation has occurred in the system. TEi = TEf What if the Total If the total amount of energy that we start with, Ei, does not equal the total Mechanical amount of energy that we end up with, "Ef", then mechanical energy is not Energy is not naturally conserved. equal at the beginning and the TEi = TEf end? Because of this, the system is not a closed system, and the surroundings are allowed to interact with the system. This means that there is an outside for that is acting on the system over some distance.