1. How would you describe a force?
Bellwork – 10/26/16
How would you describe a force?

2. Force – Varieties ( Honors )
Friction
Gravity
Air-resistance
Drag
Lift
Push or Pull
Magnetic
Support/Normal
Tension
Contact
Thrust
Nuclear
Impact
Force of gravity/weight ( W )
Applied force/thrust/lift/impact/pressure-related ( A )
Friction/air-resistance ( f )
Contact force / Normal ( support ) ( N )
Tension ( cables, ropes, strings, springs, plastic spoons ) ( T )
Electro-magnetic
Nuclear ( strong & weak )

3. Forces – Varieties ( AP )
Force of gravity
Air-resistance
Applied force
Thrust
Friction
Impact
Contact force
Lift
Tension
Magnetic
Nuclear
Weight
Force of gravity/weight ( W )
Applied force/thrust/lift/impact/pressure-related ( A )
Friction/air-resistance ( f )
Contact force ( simply from objects touching? ) ( C )
Normal ( support ) ( N )
Tension ( cables, ropes, strings, springs, plastic spoons ) ( T )
Electro-magnetic
Nuclear ( strong & weak )

4. Feeler & the Dealer Every force exists in a PAIR
Something Feels the force that something else Deals
Example:
You and the floor? It is a force pair
You exert weight on the floor & the floor feels it ( Wf,p )
Opposite is true also – the floor is exerting a support force ( Normal ) and you feel it ( Np,f )
Same subscripts but reversed indicates force-pair