Work is the scalar product of the force acting on an object and the displacement through which it acts. When work is done on or by a system, the energy of that system is always changed. If work is done slowly, we say that the power level is low. If work is done quickly, the power level is high. Kinetic energy is the energy an object has because of its motion, and potential energy is the energy an object has because of its location or configuration. If the energy of a system remains constant throughout a process, we say that energy is conserved.
Simple form: work = force x distance
W = F x d
Work is a measure of expended energy.
Work makes you tired.
Machines make work easy (ramps, levers, etc.)
Apply less force over larger distance for same work.
Work makes you tired.
Machines make work easy (ramps, levers, etc.)
Apply less force over larger distance for same work.
Definition
Heat – thermal energy that is transferred from one substance to another.
Thermal energy – the total energy of the particles in an object.
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