Term

Definition
Physical quantity that has magnitude but no direction 


Term

Definition
Physical quantity with both magnitude and direction; can be represented by an arrow 


Term
How do you add vectors? Subtract?
What about scalars with vectors? 

Definition
Place head of first to the tail of the second, then draw an arrow head to tail (resulting vector); magnitude of 2 vectors must be smaller than or equal to sum of result
for subtract, flip one of the vectors (make it go in the negative direction) and do the same thing; must be greater than or equal to resulting difference vector
Cannot add or subtract; but can multiply or divide by scalrs 


Term
How to multiply vector? Vector x scalar? 

Definition
Vector x vector: result= perpendicular to both tails together; V1V2sintheta
Vector x scalar: V1V2costheta 


Term
What are component vectors?
Easier way than SOHCAHTOA to find all magnitudes + angles? 

Definition
Each vector can be a "hypotenuse" and have 2 perpendicular "x and y" components equal to it addition wise
O= Hsintheta
A=Hcostheta
Remember, theta is always between A and H 


Term

Definition
displacement= distance with added dimension of direction; it's a vector
basically the shortest "distance" from point A to Point B; distance= actual pathway 


Term
Average Velocity
Instantaneous Velocity
Velocity can be either...


Definition
Average velocity= displacement/time
Instantaneous velocity= velocity at any moment during the trip at a specific time
Can be either all verticle or all horizontal 


Term
Acceleration
Are velocity and acceleration always in the same direction? 

Definition
any change in velocity, in EITHER magnitude or direction
velocity and acceleration do not have to be in the same direction; e.g. ball thrown up> peak, velocity= 0, but acc is still there 


Term
uniformly accelerated motion 

Definition
constant acceleration in terms of magnitude and direction (velocity changes at a constant rate) 


Term
displacement vs time graph (slope, line, area under the curve) 

Definition
slope: instantaneous velocity at that time range
upward slope= positive velocity, downward= negative
under 0 line: velocity is going in the *negative direction*
Horizontal line= not moving (0 velocity)
curved line= changing velocity, thus acceleration
area beneath= no meaning



Term
velocity vs time (slope, line, area under the curve) 

Definition
slope: instaneous acceleration at that specific time range
upward= positive acc; downward= negative acc (acceleration in the negative direction)
straight line= constant acc; curved= changing acc; flat line= no change in acc, constant velocity
area under: displacement 


Term
How to solve linear motion problems 

Definition
Draw line with initial and final velocity; center= average velocity **acc is constant
D= average vel * time
acc= time * (difference between the two velocities) 


Term
How to look at projectile motion problems 

Definition
Horizontal component seperate from verticle (both linear motion problems 


Term
Projectile motions: describe velocity in the beginning 

Definition
Angle "theta", initial velocity = vsintheta, horizontal velocity= vcostheta always 


Term
Projectile motions: what happens at the peak? equation for peak height?


Definition
height "h"= heighest since it's the peak; g= +10 m/s^2 (since there's now downward acceleration)
always; no verticle velocity
equation: vsintheta = sqroot(2gh) 


Term
In projectile motion: what determines time of flight? 

Definition


Term

Definition
this occurs when an object moves past a nonideal gas or liquid...fluid molecules drag past this object and act to impede the object's motions 

