P1: Conservation and dissipation of energy Flashcards
what are the energy stores
kinetic
gravitational potential
elastic potential
thermal
chemical
nuclear
magnetic
electrostatic
what is kinetic energy
energy an object has because it is moving
what is gravitional potential energy
energy an object has because of its height above the ground
what is elastic potential energy
energy an elastic object has when it is stretched or compressed
what is thermal energy
energy an object has because of its temperature
what is chemical energy
energy that can be transferred by chemical reactions involving foods,fuels.and the cemicals in batteries
what is nuclear energy
energy stored in the nucleus of an atom
what is magnetic energy
energy a magnetic object has when it is near a magnet or in a magnetic field
what is electrostatic energy
energy a charged object has when near another charged object
how does energy transfer
heating waves electricity forces
calculating gravitational energy field strentg
gravitiational potential energy = massXgravitational field strengthXheight
kinetic energy store calculation
kinetic energy = 0.5XmassX(speed)^2
calculating elastic potential energy
elastic potential energy = 0.5 X spring constant X (extension)^2
calculating power
power = energy transferred / time
OR
power = work done/time
what is work done
when an object is moved by a force work is done on the object the force transfers energy to the object the amount of energy transferred is equal to the work done.
