#### Transcript total

```Motion
Velocity
Acceleration
Force
Friction
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1
1
1
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2
2
2
2
2
3
3
3
3
3
4
4
4
4
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5
5
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5
Motion 1
______ is the
rate of change
in position
Motion 1
Speed is the
rate of change
In position
Motion 2
________ speed is the
total distance divided by
the total time
Motion 2
Average speed is the
total distance divided by
the total time
Motion 3
What is an object’s
change in position
relative to a reference
point? _________
Motion 3
What is an objects change in
position relative to a
reference point?
motion
Motion 4
Speed that does not
vary is called
________ speed
Motion 4
Speed that does not
vary is called
Constant speed
Motion 5
The picture indicates
what kind of speed?
Motion 5
Instantaneous speed
Velocity 1
True or False
Two bicycle riders
have the same speed.
Their velocity must also
be the same.
Velocity 1
False
Their directions may
be different.
Velocity 2
People on
Merry-go-rounds
change velocity
because
the _______ changes
Velocity 2
People on
Merry-go-rounds
change velocity
because
the direction changes
Velocity 3
DAILY DOUBLE
1. What is the equation
for calculating velocity?
2. What does each
variable stand for?
Velocity 3
DAILY DOUBLE
1. v = d/t
2. v = velocity (speed)
d = distance
t = time
Velocity 4
Amy swam 50 m
downstream in 25
seconds. What
was her average
velocity?
Velocity 4
Amy swam 50 m downstream in
25 seconds. What was her
average velocity?
V = d/t = 50 m/ 25 s = 2 m/s
Velocity 5
If Andy drives his
dune buggy at an
average velocity
of 350 m/s how
long would it take
him to go 5 km?
Velocity 5
If Andy drives his dune buggy
at an average velocity of 120
km/h how long would it take
him to go 5 km?
V=d/t so t = d/v
Convert km to m 5 km = 5000 m
t = 5 km  120 km/h =0.042h
= 60 min * 0.042 = 2.5 min
Acceleration 1
Acceleration is the
rate at which _____
changes.
Acceleration 1
Acceleration is the
rate at which velocity
changes.
Acceleration 2
The units of
acceleration
are __________
Acceleration 2
The units of
acceleration
2
are m/s
Acceleration 3
Acceleration caused
by uniform circular
motion is called
___________
acceleration.
Acceleration 3
Acceleration caused by
uniform circular motion is
called centripetal
acceleration.
Acceleration 4
A sports car can
accelerate from 0 to 60 in
6 seconds. If 60 mi/h is
equal to 27 m/s, what is
the sports car’s average
acceleration?
Acceleration 4
A sports car can accelerate from 0 to
60 in seconds. If 60 mi/h is equal to 27
m/s, what is the sports car’s average
acceleration?
a = vf – vi
t
27 – 0 m/s
2
6 s = 4/5 m/s
Acceleration 5
If a bicycle has an average
2
acceleration of -0.44 m/s
with and initial forward
velocity of 8.2 m/s, how
long will it take to come to
a stop?
Acceleration 5
If a bicycle has an average acceleration
of -0.44 m/s2 with and initial forward
velocity of 8.2 m/s, how long will it take
to come to a stop?
t = vf – vi
a
t = 0 – 8.2 m/s
-0.44 m/s2 = 18.63 s
Force 1
A _______ is a
push or a pull
Force 1
A Force is a
push or a pull
Force 2
Forces that are equal
in size, but opposite
in direction are
called
_______ forces
Force 2
Forces that are equal
in size, but opposite
in direction are
called
balanced forces
Force 3
The _____ force is the
sum of all the forces
acting on an object.
Force 3
The net force is the
sum of all the forces
acting on an object.
Force 4
If the net force is
unbalanced, the object
will _________ in the
direction of the net
force.
Force 4
If the net force is
unbalanced, the
object will
accelerate in the
direction of the net
force.
Force 5
Calculate the
resultant force for
the following.
Force 5
Calculate the
resultant force for
the following.
Friction 1
______ _______is a
force that
opposes motion
between two moving
objects that are
touching.
Friction 1
Kinetic friction is a
force that
opposes motion
between two moving
objects that are
touching.
Friction 2
Which type of friction exerts
the smallest opposing force
on a moving body?
Friction 2
Which type of friction exerts the
smallest opposing force on a
moving body?
Rolling friction
Friction 3
Frictional forces
always act in what
direction?
Friction 3
Frictional forces always act in what
direction?
Opposite the direction
of motion
Friction 4
A sky diver uses a parachute
to float to earth slowly and
safely. This is an example of
what type of kinetic friction?
Friction 4
A sky diver uses a parachute to float
to earth slowly and safely. This is an
example of what type of kinetic
friction?
Fluid friction or air
resistance
Friction 5
If the box is NOT moving down the
ramp, what is the force of static
friction exerted on the box?
Friction 5
If the box is NOT moving down the
ramp, what is the force of static
friction exerted on the box?
```