Work & Power Mr. Skirbst Physical Science Topic 05.

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Presentation transcript:

Work & Power Mr. Skirbst Physical Science Topic 05

What is work?

Work is a force acting 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?

Power is the rate at which work is done

Equation for Power P = W / t

Equation for Power P = W / t Power = work / time

Equation for Power P = W / t Power = 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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