1. Tuesday, 10/07/14 Topic: Newton’s Laws of Motion
TEKs:
P.4B:Analyze examples of uniform and accelerated motion
By the end of today SWBAT:
Understand Newton’s 3 Laws of Motion
Essential Question:
What are Newton’s 3 Laws of Motion?
Topic:
Newton’s Laws of Motion

2. Newton’s Laws
Easy as apple pie!

3. Force Force a push or a pull force of table g
Causes object to start or stop moving or change direction
force of table g

4. Newton’s 1st Law
Greeks thought that the natural state of an object was at rest.
ex. A ball stops rolling
without friction an object would never stop!
Newton’s 1st an object in motion tends to stay in motion; an object at rest tends to stay at rest

5. Newton’s 1st Law
Inertia property of matter that resists a change in motion
An object with great mass has high inertia

6. Newton’s 2nd Law f = m x a A 50N B 100N FA = 1000 kg x 0.05 m/s/s FA =
FB = 2000 kg x m/s/s
FB =
100N

7. Newton’s 2nd Law Force = mass x acceleration
An object will only accelerate if there is an unbalanced force

8. Newton’s 3rd Law
For every action there is and equal and opposite reaction
The astronaut pushes on the rock and the rock pushes on the astronaut

9. Newton’s 3rd Law
For every action there is and equal and opposite reaction
A bird pushes down on the air and the air pushes up on the bird

10. Newton’s 3rd Law
Note: Equal and opposite forces does not result in equal acceleration if the masses are different.

11. Newton’s Laws
1st Law: (inertia: objects tend to do what they are doing)
cannon ball will rest until a force is put on it
ball will roll straight until ramp puts a force on it
2nd Law: (f = m x a)
greater force put on ball accelerates it more
greater mass of ball but greater force on water
3rd Law: (every action has an equal but opposite reaction)
ball moves right, cannon recoils left
ball move down, water splashes up
Newton's Laws - YouTube