Notes:
NC18 Daily
Homeroom
Assignments Due:
Science:
Math: Topic Goals.
Algebra: Topic goals.
SciTech:
ELA: Reading Check
Spanish: Mrs. Kirby Out Today.
Civics: Quiz Today! Shadow box must be turned in by end of day to get credit.
Grade 8 Lesson
Do Now:
Please take out your notes.
Homework:
Newton’s Third Law in Google Classroom -
Due Wednesday.
Today’s Agenda:
Discuss and review Newtons third law.
Read:“Newtons Third Law” page 513-514 in MH Ch14 Motion Forces, and Energy.
Take Notes in your notebook.
Title them “Newton's Third Law” and include the date.
Be sure to include information on:
Newton's Third Law.
When an object exerts a force on a second object, the second object exerta an equal but opposite force on the first.
‘For every action, there is an equal but opposite reaction’
Action/reaction forces
Action and reaction forces always occur together.
The action is generally thought of as the force that “started it”
which force is action and which is reaction really does not matter
"force pairs"
Because forces always come in pairs, the action and reaction are called a force pair.
Force pairs are not balanced - they act on different objects!
If you “head” a soccer ball…
The push (action) of your head affect the soccer ball
it is unbalanced and the ball accelerates.
The push of the soccer ball on your head (reaction) is also unbalanced.
Your head accelerates in the opposite direction
Concussion anyone???
The action and reaction may affect the first and second object differently.
If you and an elephant are wearing roller skates AND you push off on the elephant…
you will move more than the elephant
The acceleration of your body is a=f/m
Your mass (m) is so much smaller than the elephant, you accelerate more!
Create a table similar to Table 1 on page 514.
In it describe two different examples based on activities you engage in.