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Work & Power
Mr. SkirbstPhysical Science
Topic 05
What is work?
What is work?
Work is a forceacting through a distance
Equation for Work
W = (F)(d)
Equation for Work
W = (F)(d)Work = force x distance
Equation for Work
W = (F)(d)Work = force x distance
(Joules) = (Newtons) (meters)
Example:A student who weighs 500 N climbs a flight of
stairs 5 m high. How much work is done?
What is power?
What is power?
Power is the rateat which work is done
Equation for Power
P = W / t
Equation for Power
P = W / tPower = work / time
Equation for Power
P = W / tPower = work / time
(Watts) = (Joules) / (seconds)
Example:If the student from the previous example
climbed the stairs in 5 seconds, how much power was required of her?
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