1. Action Reaction IN REAL LIFE!!!!

2. Action:
Baseball bat exerts a force on the baseball
Baseball exerts a force back on the baseball bat
Reaction:

3. Air exerts a force outward on balloon
Balloon exerts a force on the inside air
Action:
Reaction:

4. Action:
Reaction:
Bowling ball exerts a force on the pin
Pin exerts an equal force ball on the bowling ball

7. Equal Forces does NOT mean equal accelerations!!!
When you jump….
Action: You exert a force down on the Earth
Reaction: The Earth exerts a force to push you up
Action Force
= Reaction Force
Mass x acceleration
Mass x acceleration

8. An unfortunate bug splatters against the windshield of a moving car.
Which is greater:
The acceleration of the bug
The acceleration of the car
Which is greater:
The force exerted by the car on the bug
The force exerted by the bug on the car
BOTH ARE EQUAL!!!
If forces are equal, the larger mass will have a smaller acceleration than the smaller mass
Ex – tennis ball goes faster when pushed than a bowling ball
Why???
Equal but opposite forces

9. A) Volkswagon B) Mack Truck C) Both the Same
A Mack Truck and a Volkswagon traveling at the same speed have a head-on collision. The vehicle to undergo the greater change in velocity will be the….
A) Volkswagon
B) Mack Truck
C) Both the Same

10. Where are the Forces?! John Deere Stretch Armstrong Dumbo Weight
Normal Force from ground
Friction Force 
Tension 
Applied force from motor 
Weight
Normal Force from ground
Friction Force 
Tension 
Applied Force 
Tension (x2)
Weight

11. Would changing the weight of the shoe change the coefficient of friction?