Position vs time Graph Low on the graph High on the graph Slopes uphill Slopes downhill 0 x t Near Far Away Toward How to interpret a Position vs time Graph Steep slope ID: 759551
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Slide1
Motion Graphs
Physics
Slide2How to interpret a Position vs. time Graph
Low on the graph
.
High on the graph
.
Slopes uphill.
Slopes downhill.
0
x
t
Near
Far
Away
Toward
Slide3How to interpret a Position vs. time Graph
Steep slope.
Gradual slope.
Slope is flat.
Slope changes direction
0
x
t
Fast
Slow
Not moving
Turn
Slide4How to interpret a Velocity vs. time Graph
0
v
t
Fast
Slow
Away
Toward
In top quadrant.
In bottom quadrant.
Far from the time axis.
Fast
Slow
Close to the time axis.
On the time axis.
+ Quadrant
-
Quadrant
Slide5How to interpret a Velocity vs. time Graph
0
v
t
Getting faster
Slowing down
Constant speed
Turn
Gets further from time axis.
Gets closer to the time axis.
Getting faster
Slowing down
Line
is flat.
Switches quadrants
Slide6Draw a MOTION MAP a POSITION graph and a VELOCITY graph for each of the following scenarios.
R
.
0
.
.
.
R
0
.
.
.
.
R
0
.
.
.
.
.
.
Slide7Draw a MOTION MAP a POSITION graph and a VELOCITY graph for each of the following scenarios.
Slide8Draw a MOTION MAP a POSITION graph and a VELOCITY graph for each of the following scenarios.
Slide9The following graphs are POSITION vs. TIME. Describe the motion of objects A and B below each graph.
SAME:DIFFERENT:
SAME:DIFFERENT:
BOTH MOVING AWAY AT CONSTANT SPEEDS.
A IS GOING FASTER.
BOTH MOVING AT SAME SPEED. (KNOW THIS BECAUSE THEY ARE PARALLEL.)
A GOT A HEAD START (POSITION WISE).
A DID NOT START AT ZERO.
Slide10The following graphs are POSITION vs. TIME. Describe the motion of objects A and B below each graph.
A:B:Q:Z:
BOTH:A:B:W:M:WHERE IS THE SPEED THE SAME?
A IS MOVING AWAY AT A CONSTANT SPEED.
B IS NOT MOVING.
Q IS WHERE B IS AT.
Z IS THE TIME A PASSED B.
BOTH ARE MOVING AWAY
A IS SPEEDING UP.
B
IS SLOWING DOWN.
W IS WHERE THEY PASS.
M IS WHEN THEY PASS.
WHEN THEY ARE PARALLEL.
Slide11The following graphs are VELOCITY vs. TIME. Describe the motion of objects A and B below each graph.
SAME:DIFFERENT:
SAME:A:B:
BOTH MOVING AWAY AT CONSTANT SPEEDS.
A IS GOING FASTER THAN B.
BOTH MOVING AT CONSTANT SPEEDS.
A IS GOING AWAY.
B
IS COMING BACK.
SO SAME SPEEDS BUT DIFFERENT DIRECTIONS.
Slide12The following graphs are VELOCITY vs. TIME. Describe the motion of objects A and B below each graph.
SAME:A: B:
1)2)3)
A & B MOVE AWAY.
A IS GETTING FASTER.
MOVING AWAY AND GETTING SLOWER
STOPS (INSTANTANEOUS STOP) AND TURNS
COMING BACK AND GETTING FASTER.
EXAMPLE OF THIS IS THROWING A BALL.
B
IS GETTING SLOWER.
SAME VELOCITY HERE
1
2
3
Slide13HOW TO INTERPRET AN ACCELERATION VS. TIME GRAPH
When it comes to acceleration graphs there are three kinds to choose from:POSITIVENEGATIVEZERO
Slide14HOW DO I KNOW WHICH ACCELERATION GRAPH TO CHOOSE?
Looking at VELOCITY graphs:If the velocity graph goes up, then…ExampleIf the velocity graph goes down, then...Example
POSITIVE ACCELERATION.
v
t
v
t
a
t
v
t
v
t
a
t
NEGATIVE ACCELERATION.
Slide15HOW DO I KNOW WHICH ACCELERATION GRAPH TO CHOOSE?
VELOCITY graphs (Cont.):If the velocity graph is constant, then…ExampleI know this because...
ZERO ACCELERATION.
v
t
v
t
a
t
ACCELERATION IS THE SLOPE OF A VELOCITY VS. TIME GRAPH
Slide16HOW DO I KNOW WHICH ACCELERATION GRAPH TO CHOOSE?
Looking at POSITION graphs:If the position vs. time graph makes a smiley face or half of a smiley face, then…ExampleIf the position vs. time graph makes a frowny face or half a frowny face, then...Example
POSITIVE ACCELERATION.
a
t
a
t
NEGATIVE ACCELERATION.
x
x
x
x
x
x
t
t
t