ENERGY, WORK, POWER Conservation of Energy SC.CE.05.04.

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Presentation transcript:

ENERGY, WORK, POWER Conservation of Energy SC.CE.05.04

WORK IS DONE WHEN: a force moves a body a distance W=Fd

ENERGY IS:  The capacity to do work

ENERGY IS:  The capacity to do work  ENERGY=WORK

ENERGY IS:  The capacity to do work  ENERGY=WORK  So Energy= Force x distance E=Fd

UNIT OF ENERGY:  Since Energy=Force x distance, the unit of energy must include a unit of force and distance

UNIT OF ENERGY:  IN PHYSICS THE UNIT OF ENERGY IS THE JOULE (J)

UNIT OF ENERGY:  1 Joule = 1 Newton of force × 1 meter of distance

UNIT OF ENERGY:  1 J=1 N ×1 m

UNIT OF ENERGY:  Since Energy=Force x distance, the unit of energy must include a unit of force and distance  IN PHYSICS THE UNIT OF ENERGY IS THE JOULE (J)  1 Joule = 1 Newton of force × 1 meter of distance  1 J=1N × 1m

REVIEW QUESTIONS:  How does energy relate to work?  Energy is equivalent to work

REVIEW QUESTIONS:  What unit is used to express energy?  The Joule (J)

REVIEW QUESTIONS:  The Joule is an abbreviation of what two units?  Newton and meter (Force and distance)

POWER IS:  The RATE at which work is done

POWER IS:  Found by dividing amount of work done by time

POWER IS:  Power=Work/time

POWER IS:  P=W/t

POWER IS:  The RATE at which work is done  Found by dividing amount of work done by time  Power=Work/time  P=W/t

OK…E=W=Fd & P=W/t  So, P=Fd/t

OK…E=W=Fd & P=W/t  The primary unit of power in physics is the watt (W)

OK…E=W=Fd & P=W/t  One watt = One Joule/second

OK…E=W=Fd & P=W/t  So, P=Fd/t  The primary unit of power in physics is the watt (W)  One watt = One Joule/second

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