You can see it on a position time graph OR a velocity time graph POSITION v TIME Velocity is seen by the slope Graphing motion positiontime Section 1 on graph represents biker going forward ID: 660546
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Slide1
GRAPHING
VELOCITYSlide2
How do you see velocity on a graph?
You can see it on a
position time
graph OR
a
velocity time
graphSlide3
POSITION v TIME
Velocity is seen by the
slopeSlide4
Graphing motion
position-time
Section 1 on graph represents biker going forward
Section 2 on graph represents biker sitting still
Section 3 on graph represents biker going backwardSlide5
Position -v- time
IF Velocity
= zero (stopped)
This means: At
all times,
same position
Looks Like:
Horizontal straight lineSlide6
Graphing motion
position-time
Section 2 on graph represents biker sitting stillSlide7
Position -v- time
If there is: Constant velocity
in positive
direction
This means: Moving
forward
Looks like:
Straight line with positive slopeSlide8
Graphing motion
position-time
Section
1
on graph represents biker
moving forwardSlide9
Position -v- time
If there is :Constant
velocity
in
negative
direction
This means:
backwardLooks like: Straight line with negative slopeSlide10
Graphing motion
position-time
Section
3
on graph represents biker
moving backwardSlide11
Position -v- time
If there is: Constant faster velocity
Looks
like:
steeper
slope
Can be
positive or negative
in directionSlide12
more position-time graphsSlide13
Uniform
Motion Summary
Position vs. Time
Constant velocity
Looks like?
A
s
traight lineSlide14
Slope of Position vs. Time
You can calculate velocity by finding the
slope
of a position vs. time graph
- Slope of a line is
…
(y
2 – y
1)/(x2 – x
1) OR D
y/Dx
- Here the y axis is distance and the x axis is time so…
v = Dd/
DtSlide15
Slope of Position vs. Time
Find the velocity of the object shown below
d
(m)
t (s)
D
t
D
dSlide16
Velocity v Time
You can also see velocity on a velocity v time graph
You see it as the
y-valueSlide17
Uniform Motion
Velocity vs. Time
If there is :Constant velocity
This means
y value
won’t change
Looks like?
A horizontal lineSlide18
Velocity -v- time graph
Positive velocity (forward
)
Positive y-valueSlide19
velocity
-v-
time graph
Negative velocity (backward)
Negative y-valueSlide20
velocity
-v-
time graph
Zero velocity (not moving)
Zero y-valueSlide21
velocity
-v-
time graph
Faster vs. slowerSlide22
You can see
displacement
of an object on a velocity vs time graph by find the
area under the curve
Velocity -v- time graphSlide23
Find
displacement of object between 6 s and 12 s
Velocity -v- time graph
240 m
right