Term
displacement ("delta vector r") 

Definition
the vector drawn from the initial position ("vector r knot") at time "t knot" to the final position "vector r" at time "t" 


Term
average velocity ("vector v bar") 

Definition
"delta vector r" (displacement) divided by "delta t" (elapsed time) 


Term
instantaneous velocity ("vector v") 

Definition
the velocity of an object at an instant of time 


Term
equation for instantaneous velocity 

Definition
"vector v" = the limit as "delta t" approaches 0 of "delta vector r" over "delta t" 


Term
average acceleration ("vector a bar") 

Definition
the change in velocity ("delta vector v") divided by elapsed time ("delta t") 


Term
instantaneous acceleration ("vector a") 

Definition
the limit as "delta t" approaches 0 or "delta vector v" divided by "delta t"; as elapsed time becomes infinitesimally small, the average acceleration becomes equal to instantaneous acceleration 


Term
What is the term "components" short for? 

Definition


Term
Are x and y motions independent of each other? 

Definition


Term
Can twodimensional motion be thought of as two distinct onedimensional motions (one for x and one for y)? 

Definition


Term
What do symbols "x" and "y" denote? 

Definition


Term
What does symbol "v" denote? 

Definition


Term
What does symbol "a" denote? 

Definition


Term
What does symbol "v knot" denote? 

Definition


Term
What does symbol "t" denote? 

Definition


Term
Under what assumption can a good description of projectile motion be obtained? 

Definition
the assumption that air resistance is absent 


Term
What are the implications for acceleration in the x and y directions under projectile motion? 

Definition
ax = 0 m/s^2 ay = acceleration due to gravity 


Term

Definition
the horizontal distance traveled between launching & landing, assuming the projectile returns to the same vertical level at which it was fired 


Term
In projectiles, in general, if the only acceleration is that due to gravity, the shape of the path can be shown to be a _____ 

Definition


Term
Does the order of the subscripts of "vector v" matter when describing relative velocity? 

Definition

