Exam 1 Flashcards
(24 cards)
speed
distance/time
instantaneous speed
speed at any instant
average speed
total distance/time interval
velocity
speed and direction, vector
scalar quanitiy
requires only magnitude, speed
vector quantity
specifies direction as well as magnitude
constant velocity
constant speed and direction, straight line
acceleration
change of velocity/time interval, rate velocity changes
units of acceleration
m/s2
free fall
falling object is free of all restraints and falls under the inlfucne of gravity
g
gravity, 9.81
the instantaneous velocity of an object falling from rest
v=gt
downward velocities
negative sign
upward velocities
positive sign
distance of freely falling object
d=1/2gt2
terminal speed
when acceleration terminates
terminal velocity
concerned with the direction of falling objects
projectiles
an object that is projected by some means and continues in motion by its own inertia
parabola
a projectile that accelerates in only a vertical direction while moving at constant horizontal velocity
velocity of projectile
vertical component change and horizontal component is the same
acceleration can only act on
direction or magnitude
what angle is the max range
45
centripetal acceleration
responsible for uniform cirrcular motion
the circular path of a satellite is characterized by a constant
speed, acceleration, radial distance
