1. Work and Power
How We Get Stuff Done!!!

2. 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!!

3. 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

4. WORK OR NO WORK?

5. 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!!

6. PRACTICE CALCULATING WORK

7. WELL WHAT IF I GET MY WORK DONE QUICKER?
YOU’VE GOT POWER!!
Power: the rate at which work is done

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

9. 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