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ch 4&5

Kinetic energy energy of a moving object has because of its motion 
joule SI unit of energy 
potential energy stored energy an object has due to its position
Elastic potential energy energy stored when an object is compressed or stretched 
chemical potential energy energy stored in chemical bonds 
gravitational potential energy energy stored by objects due to their position above Earth's surface 
Mechanical energy sum of the potential energy and kinetic energy in a system 
Law of conservation of energy states that energy can never be created or destroyed 
Work transfer of energy that occurs when a force makes an object move; measured in joules
Power amount of work done, or the amount of energy transferred, divided by the time required to do the work or transfer the energy; measured in watts 
Machine device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied
Input force the force that is applied to the machine 
Output force the force that is applied by the machine 
Mechanical advantage ratio of the output force exerted by a machine to the input force applied to the machine 
Efficiency ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage 
Simple machine machine that does work with only one movement
Compound machine machine that is a combination of two or more simple machines 
Created by: adajahhoran