Lecture 4 Flashcards
when a person and/or object are undergoing acceleration, average velocity formulas are
inaccurate
you must use the formulas provided
the direction of acceleration tells you
which way the velocity is changing
acceleration
measure of the rate of change of velocity with respect to time
vector quantity
acceleration and velocity
if there is a change in velocity (either magnitude or direction) then there is acceleration
the direction of the acceleration tells you which way the velocity is changing
if accelration and velocity are in the same direction, velocity will _____ in that direction over time
increase
if acceleration and velocity are in opposite directions, velocity will _____ over time until the person and/or object stops or changes direction
decrease
projectile motion
the motion of objects projected through the air
projectiles follow a parabolic path throughout their flight
projectiles undergo a constant vertical acceleration of ______due to gravity
-9.81m/s2
projectile motion:
if the launch height and landing height are equal
-the time from launch to apex is equal to the time between apex and landing
-the horizontal displacement from the launch point to apex is equal to the horizontal displacement from the apex to the landing point
projectile motion
if the launch point is higher than the landing point
time between the launch point and apex will be shorter than the time between apex and landing point
projectile motion
if landing point is higher than the launch point
time between launch point and apex will be longer than time between apex and landing point
the vertical and horizontal acceleration of projectiles are
constant
you must use the constant acceleration formulas if the person/obeject is undergoing
acceleration
the ____ of a velocity time graph is acceleration
slope
