Unit 1 Test: Kinematics Flashcards
scalar
only has magnitude, no direction Ex: 5m/s
vector
magnitude and direction ex: 5 m/s East
distance
scalar, meters
displacement
change in position, vector
average speed
distance/ time; meters/per sec; scalar
average velocity
displacement/change in time; meters/seconds, vector
acceleration
how velocity changes over time, vector
average acceleration
average velocity/ time
position time graph constant speed
straight, diagonal line
position time graph increasing velocity
exponential shape up to the right
position time graph decreasing velocity
exponential shape down to the right
velocity time graph constant velocity
straight line (not on orgin)
velocity time graph increasing velocity/accelerating
straight diagonal up to the right
velocity time graph decreasing
straight diagonal down to the right (not crossing orgin)
position time graph
shows how position changes over time
-y-axis= position (x, cm)
-x-axis= time (t, seconds)
-slope of position time graph= velocity
Velocity time graph
-shows how velocity changes over time
-straight line=0 acceleration
-slope of velocity time graph= acceleration
-under orgin line=moving backwards
free fall
occurs when an object is moving through the air
-objects in free fall have acceleration of 10m/s^2
-if a ball dropped from rest:
-initial velocity is 0m/s
-acceleration is negative a=-10m/s^2
-ball thrown up: starts w/ positive velocity, slows down + reaches 0, speeds up to opposite of initial velocity
-ball thrown down: starts w/ negative velocity,
what does a horizontal line on position time graph mean?
standing still
What does straight diagonal line on position time graph mean?
constant velocity
what does a curved line on position time graph mean?
acceleration
what does a horizontal line on velocity-time graph mean?
constant velocity
what does a straight diagonal line on a velocity-time graph mean?
accelerating
