1. What is a Force?
A force is a push or pull on an object
A force has a size AND a direction
Examples of forces:
-Pushing your book across a table
-Pushing a box

2. Newton’s First Law
What is Newton’s 1st law??
• Objects in motion stay in motion
• Objects at rest stay at rest

3. Force is equal to an object’s mass times its acceleration
maf

Newton’s Second Law
m = 1000 kg
a = 0.05
f = ???
f = 50 N

4. Newton’s Third Law
All forces exist in pairs (pair = 2)
For every action, there is an equal and opposite reaction
THERE CANNOT BE ONE FORCE

5. Videos…….
http://www.youtube.com/watch?v=NYVMlmL0BPQ
http://www.youtube.com/watch?v=QffUhiX2uSg
http://www.youtube.com/watch?v=JGO_zDWmkvk
http://www.youtube.com/watch?v=cP0Bb3WXJ_k

6. Complete Questions in Notebook
1. Using the equation to the right, what will be
more difficult to accelerate, an object with a
large or a small mass?
2. Explain Newton’s first, second and third laws
and draw a picture to help explain each law.
maf
