WORK Tuesday

NOTES


ASSESSMENT TOMORROW over Chapters 5, 6,7--READ!~

Schedule for the Week and 6, 7, 8 notes

Monday: Chapter 6, 7, 8 Notes and get all tests from the semester (staple together in order)

Tuesday: Study for exam and Chapter 6, 7, 8 Assessment 

Wednesday: Chapter 6, 7, 8 Assessment  and study for exam time    **collect books

Thursday: Study 

Friday: Exam and turn in ALL tests as a packet

NOTES: 

Work is done when a force moves an object some DISTANCE (displacement)!!

Work has direction--positive and negative--can cancel each other out to have a displacement of 0)

Work=Force times displacement (W=F*d)   (direction matters so label + or -)
Work label is JOULE (J) and remember Force=m*g or weight
 
(a meter/newton is Torque)





The more powerful machine it can do more work in a certain amount of time. Power is work divided by time. P=W/t   
Label: Joules/seconds.....WATTS


 Kinetic Energy and Potential Energy: The unit is joules. Because there has to be work to get either one of these types of energies. 

KE=1/2 mass * velocity squared  (just velocity is squared....)   and label is joules 

PE= 
potential elastic: storing something in something stretched (like a rubber band)

potential gravitational: 

PE_e=1/2 k x²

K is spring constant and x is displacement

PE_g=mgh 

Potential Energy gravitational= mass times acceleration due gravity times height

Law of Conservation of Energy: 

• energy cannot be destroyed
• it can only change forms or states