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32 Cards in this Set
 Front
 Back
Vector

Quantity that has both number (magnitude) and direction (velocity)


Scalar

Just a number (speed)


Adding Vectors

HeadtoTail


Subtracting Vectors

It is not communitive
 Put the head pointing the opposite direction 

Multiplying a vector by a scalar

Make that vector however many times longer depending on the number said(scalar)


Components of a Vector

 Vertical Component
 Horizontal Component 

Pythagorean Thm

a2 + b2 = c2
c2 = hypoteneuse 

Ball Launch Experiment

 How far forward did it go?
 How high was the cliff?  How fast was the car going when it hit the ground? 

Vertical and Horizontal Motion

They are independent


Projectile Motion

Freefall in 2 or 3 D
Horizontal Speed no change Vertical Speed affected by gravity 

Maximum Range

Any two angles that add up to 90* will hit the same spot


Earth Orbit

8 km/s


Galileo: Inertia

 Resistance to change in motion
 The property of objects to keep doing whatever they are doing 

Newton's 1st Law

 Objects in motion remain in motion at a constant velocity
 objects in rest remain at rest  Unless acted upon by a net total outside force that it not from that objects itself 

Mass

 Physical amount of material in that object
 "mass is the measure of inertia"  more mass more inertia 

Weight

 Force of gravity acting on an object
 w=mg 

Newton

N
kgm/s2 = N 

Equilibrium

When the net force is 0


Force Diagrams

 Draw only one object
 Draw forces on that object as vectors  Only draw forces that act ON the object 

Net force

 Sum of all of the forces on an object
 Fnet= 0  no change in motion rest, constant velocity 

Newton's 2nd Law

 More mass more resistance to change in motion (more inertia)
 apply more net force more change in motion a= f/m 

Newton's 2nd Law for gravity

Constant force produces constant acc
Fgrav=magrav w=mg 

Freefall

agrav=Fgrav/m
=w/m =mg/m =g  All objects fall at the same rate 

Pressure

Force Concentration
P=F/A More area less pressure (Pa) 

Pascals

Measurement for Pressure


Friction

 Force that opposes motion
 caused by intermolecular snagging 

Pressure and Friction

Pressure, Surface Area
Book on side vs. Book on spine: Same total friciton Wide tires: No change in traction (friction) 

Air Resistance

 Friction with air
 Depends on speed, surface area Fnet 0, Acc 0 

Terminal Velocity

 Reaches its final speed, and continues going at the same rate
 Reaches equilibrium  Morse massive faster terminal velocity and also hits the ground first  Single Reaches terminal velocity first 

Satellites

Projectiles in Orbit
close to earth 8 km/s 

Earth's Curvature

8 km forward
5 m downward 

Inertia

Resistance to change in motion
 depends on mass measure of inertia 