work and energy test Flashcards
work
the transfer of mechanical energy between two objects that exert force on each other (J)
energy
the ability of an object to do work on another object (J)
mechanical energy
the amount of work an object can do because of the object’s kinetic and potential energy’s (J)
power
the rate at which work is done by a force per unit time (J/S)
simple machines
basic machine, basis for all other machines
work input
total work, bigger number bottom (J)
work output
remaining energy left, smaller number on top (J)
complex machines
machine made or more than one simple machine
kinetic energy
energy due to motion (J)
potential energy
energy of an object based on its potential for movement(J)
gravitational pe
object with potential for movement due to its height above surface of earth (J)
Law of Conservation of Energy
energy can be neither created nor destroyed only transferred
work-energy principle
total work done on an object by a net force equals the change in the object’s kinetic energy
