Download Physics Chapter 5 Vocabulary Section 1 Energy: the ability to do

Physics Chapter 5 Vocabulary Section 1 Energy: the ability to do work Kinetic energy: the energy of motion; depends on speed and mass Potential energy: the energy of position or shape. Mechanical energy: the total energy of motion and position of an object. Section 2 Energy conversion: a change from one form of energy into another; any form of energy can be converted into any other form of energy. Section 3 Friction: a force that opposes motion between two surfaces that are touching. Law of conversation of energy: the law that states that energy is neither destroyed nor created. Section 4 Energy resource: a natural resource that can be converted by humans into other forms of energy in order to do useful work. Nonrenewable resources: natural resources that cannot be replaced or that can be replaced only over thousands or millions of years. Fossil fuels: nonrenewable energy resources that form in the Earth’s crust over millions of years from the buried remains of once-­‐living organisms. Renewable resources: natural resources that can be used an replaced over a relatively short time.