2. Motion 1
What is motion? How do you know if
something is “in motion?”
3. Motion 2
Motion is the changing distance
between two objects.
You can tell if something is “in motion”
based on a reference point.
Reference point: A place or object used
for comparison to determine if something is
in motion.
4. Motion 3
Are we moving right now? Yes? No?
How do you know?
What is your reference point?
**Technically, we are doing both moving
AND not moving depending on your
reference point!
5. Speed 1
What is speed?
How do you know what “speed” you are
going?
Is speed fast or slow? Or both?
6. Speed 2
Speed is the amount of distance an
object travels in any given amount of
time.
We calculate speed like this:
Speed = Distance / Time
Average speed is just:
total distance / total time
7. Velocity 1
What is velocity?
Is velocity the same thing as speed?
How do I know what an objects velocity
is?
8. Velocity 2
Velocity is speed with direction.
When dispatch contacts a police officer
to let them know where a suspect is,
they will give them a velocity: “the
perpetrator is on walnut st. traveling at
40mph north.”
What else do we use velocity to
describe?
9. Velocity 3
Change in velocity can be due to two
things:
1. Change in speed
2. Change in direction
(it can be only one or both)
10. Acceleration 1
What is acceleration?
What does it mean to accelerate?
What is the opposite of accelerate?
11. Acceleration 2
Acceleration is the rate at which velocity
changes with time.
If velocity requires both speed and
direction, then acceleration also
requires both speed and direction.
Therefore… acceleration refers to
increasing speed, decreasing speed or
changing direction!
12. Acceleration 3
Increasing speed: When an objects
speed increases, it is accelerating.
Decreasing speed: When an objects
speed decreases, it is deccelerating or
has negative acceleration.
Changing direction: If the direction
changes so does the acceleration-
even if the speed stays the
same!!!
13. Acceleration 4
Calculating acceleration: you must figure
out the change in velocity per unit time.
Acceleration= Final velocity - Initial Velocity
time
The units used for Acceleration are meters
per second per second or m/s 2
14. Energy
Energy is the ability to do work or cause
change.
When a living thing does work on
another object, some of that energy is
transferred.
Examples?
15. Kinetic Energy 1
Kinetic energy is the energy an object
has due to its motion; this depends on
both it’s mass and it’s speed.
More mass means more kinetic energy
More speed means more kinetic energy
Examples?
16. Kinetic Energy 2
Calculating Kinetic Energy:
Kinetic Energy = 1/2 x Mass x Speed 2
Note- changing the speed has a greater
impact on the object’s kinetic energy
than changing the mass.
17. Potential Energy 1
Potential Energy is stored energy that
results from an objects position or
shape.
This object has the potential to do work.
When the object was placed where it is or
shaped a certain way, energy was
transferred to it.
Examples?
18. Potential Energy 2
Gravitational Potential Energy is an
objects potential energy based on
gravity. This is dependant on its height
relative to a reference point and it’s
weight.
Elastic Potential energy is the potential
energy of an object that can be
stretched or compressed
19. Law of Conservation of
Energy
According to the law of conservation of
energy, energy cannot be created or
destroyed.
(sound familiar? What is another law that is
similar to this?)
