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Work and Power How We Get Stuff Done!!!

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**BE WORK…THE BOX MUST MOVE EAST AS WELL!!**

What is work? Work: occurs when a force causes an object to move in the direction of the force applied HEAVY BOX FORCE IF THE FORCE MOVES TO THE EAST, THEN IN ORDER TO BE WORK…THE BOX MUST MOVE EAST AS WELL!!

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**HOW CAN WE TELL WHEN WORK IS DONE?**

2 CHARACTERISTICS OF WORK BEING DONE: THE OBJECT MOVES WHEN A FORCE IS APPLIED 2. THE OBJECT MOVES IN THE SAME DIRECTION THAT THE FORCE IS APPLIED

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WORK OR NO WORK?

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**HOW DO WE FIND HOW MUCH WORK IS BEING DONE?**

CALCULATING WORK HOW DO WE FIND HOW MUCH WORK IS BEING DONE? WORK = FORCE X DISTANCE WORK = NEWTONS X METERS UNITS = JOULES (J) MORE MATH!!

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**PRACTICE CALCULATING WORK**

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**WELL WHAT IF I GET MY WORK DONE QUICKER?**

YOU’VE GOT POWER!! Power: the rate at which work is done

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**POWER = JOULES ÷ SECONDS**

Calculating power Power = work ÷ time POWER = JOULES ÷ SECONDS UNITS = WATTS (W) Even MORE MATH!!

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**YES!! Can we get more power? TWO WAYS TO INCREASE POWER: BEING DONE**

1. INCREASE THE WORK BEING DONE 2. DECREASE THE TIME IT TAKES TO DO THE WORK

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Mathematically we define power as: The unit of power is J/s or Watts (W) (this is sometimes confusing because W is also the symbol for work) Mathematically.

Mathematically we define power as: The unit of power is J/s or Watts (W) (this is sometimes confusing because W is also the symbol for work) Mathematically.

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