force motion and energy Flashcards
motion
an objects change in position relative to a reference point
speed
the distance traveled divided by the time interval during which the motion occurred.
velocity
the speed of an object in a particular direction.
acceleration
the rate at which velocity changes over time; an object acceleration if its speed, direction, or both change.
energy
the capacity to do work
kinetic energy
the energy of an object that is due to the objects motion
potential
the energy an object has because of its position
mechanical energy
the total energy of motion and position of an object
nonrenewable resources
cannot be replaced
fossil fuel
energy resources that formed from the buried remains of plants and animals that lived millions of years ago
renewable resources
naturally replaced more quickly
states of matter
the physical forms of matter, which include solid, liquid, and gas
change of state
the change of a substance from one physical state to another
insulation
a material that reduces the transfer of thermal energy
heat engine
a machine that transforms heat into mechanical energy, or work
