Speed, Velocity, and Acceleration Notes
Presentation
•
Physics
•
8th Grade
•
Easy
Standards-aligned
Kristi Warf
Used 25+ times
FREE Resource
15 Slides • 16 Questions
1
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PS.8a
Motion, Speed, Velocity, &
Acceleration
2
Motion is an object’s change in position relative to a
reference point.
Examples:
The Earth’s surface is often used as a reference point.
Trees or other buildings are also often used as a reference
point.
Motion, Speed, Velocity, & Acceleration
Motion:
3
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Speed is the
distance traveled in
a certain amount of
time
Units for speed:
km/hr
cm/s
m/s
.
Normally, objects do
not travel at a
constant speed.
What stops the
objects from
traveling at a
constant speed?
.
SPEED
FORMULAS
SPEED
Motion, Speed, Velocity, & Acceleration
4
What is the speed of a sailboat that is traveling 100 meters in
120 seconds?
Example 1
Example 2
Example 3
Timothy runs 51 meters in 14 seconds. What is his speed?
Calculate the speed for a car that went a distance of 125
kilometers in 2 hours time.
Motion, Speed, Velocity, & Acceleration
5
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VELOCITY
Velocity vs. Speed
Example 1
Example 2
Example 3
VELOCITY is the speed of an object in a PARTICULAR
DIRECTION.
Velocity differs
from speed
because it has a
specific
direction.
If a runner is
running east at
10 m/s, what is
her velocity?
A plane flew east
10,000 km, from
Virginia to France in
24 hours. What was
the velocity of the
plane during its flight?
What is Xander’s
velocity if he runs
200 meters toward
the school in 120
seconds?
Motion, Speed, Velocity, & Acceleration
6
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Accleration
Acceleration is the rate
at which speed or
velocity changes.
It can be an increase in
speed, a decrease in
speed, or a change in
direction.
Units of acceleration are
m/s2
As speed or velocity increases, so does acceleration.
As speed or velocity decreases, so does acceleration.
Increasing & Decreasing Speed
Changing Direction
Constant Speed or Velocity
Acceleration changes when there is any
change in direction.
When there is CONSTANT speed or velocity,
there is NO ACCELERATION..
Motion, Speed, Velocity, & Acceleration
7
Poll
Geese fly 23mph to the south when they migrate in the winter.
Speed
Velocity
Acceleration
8
Poll
Geese fly 23mph to the south when they migrate in the winter.
Speed
Velocity
Acceleration
9
Multiple Choice
How do you calculate average speed?
distance divided by time
time divided by speed
speed divided by time
total distance divided by total time
10
Multiple Choice
The change in position over time is called
speed
motion
velocity
acceleration
11
Multiple Choice
A car travels 120 miles in 12 hours. What is the car's speed?
10 mph
10 m/s
240 mph
240 m/s
12
Multiple Choice
A train travels 225 kilometers in 2.5 hours. Calculate the train's speed.
95 mph
90 km/h
90 h/km
90 m/s
13
Multiple Choice
The formula d/t is used for calculating ________ and ________.
motion/position
speed/acceleration
velocity/motion
speed/velocity
14
Multiple Choice
What is the difference between the velocity and the speed of an object?
Velocity is the change in distance over time, while speed is the change
velocity over time.
Velocity has a direction associated with it, while speed has no specific
direction.
Velocity has no direction associated with it, while speed has a specific
direction.
Velocity is the change in speed over time, while speed is the change in
distance over time.
15
Multiple Choice
Which of the following best describes the acceleration of an object?
50 m/s
50 m east
50 m/s east
50 m/s2
16
Velocity= Speed and Direction
17
Velocity= Speed and Direction
18
Poll
The motorcycle slowed down as it approached the yield sign.
Speed
Velocity
Acceleration
19
Acceleration- Change in Speed.
20
Poll
A snail can crawl 2 meters in 2 hours.
Speed
Velocity
Acceleration
21
Speed- Dividing distance and Time will calculate speed.
22
Poll
The race car sped into the turn as it went around the track.
Speed
Acceleration
Velocity
23
Acceleration- Change in speed.
24
Poll
The tornado is traveling northwest at 20mph
Speed
Velocity
Acceleration
25
Velocity- speed and direction
26
Poll
The jogger ran 3miles in 28 minutes.
Speed
Velocity
Acceleration
27
Speed- Distance and time are used to calculate speed.
28
Poll
The horse ran 44mph to win the race.
Speed
Velocity
Acceleration
29
Speed- Distance and time are used to calculate speed.
30
Poll
The boat traveled toward China at 8knots.
Speed
Velocity
Acceleration
31
Velocity- Speed and Direction.
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PS.8a
Motion, Speed, Velocity, &
Acceleration
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