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# ch 12345

### physics

Energy the ability to cause change measured in joules
three forms of energy Kinetic energy, potental energy, and mechanical energy
kinetic energy the form of motion and depends on mass and velocity
potential energy its stored energy and depends on position or configuration of an object
three types of potential energy Elastic energy, Chemical energy, gravitational energy
explain mechanical energy the sum of the total amount of potential and kinetic energy in a system
law of conservation states energy cannot be created or destroyed
when a car begins to move, what type of energy conversion occurs electrical to mechanical to kinetic energy
what energy is applied when rubbing hands together kinetic energy
what type of energy is in fuel coal, natural gas, and nuclear
what is the formula for gravitational potential in an object gpe=ugh
power rate at which energy is converted, measured in watts
what is work transfer of energy when a force is applied over a distance measured in joules
when is work not applied one person is on one side of a box and another person is on the other and both are pushing not going anywhere so work is not being done
mechanical advantage ratio of the output force exerted by a machine to the input force applied to the machine,
units for energy energy=joules work=joules power=watts
can input work = output work No because gravity is attracting on objects
six simple machines pully, lever, wheel and axel, and screw
fulcrum the point at which a lever recedes
one joule is work of units
one watt is power of units
temperature measure of the average kinetic energy of all the particles to make up an object
how is kinetic energy and temp alike higher the temp the more thermal energy is possible
heat energy that is transferred between objects due to a temp difference between those objects
three methods of transferring thermal energy the temp, mass, and type of substance
Created by: hrrenee21