2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
Motion Velocity Friction Acceleration Force
______ is the rate of change
in position
Motion 1
Speed is the rate of change
In position
Motion 1
________ speed is the total distance divided by
The total time
Motion 2
Average speed is the total distance divided by
the total time
Motion 2
What is an objects change in position
relative to a reference point? _________
Motion 3
What is an objects change in position relative to a
reference point?
motion
Motion 3
Speed that does not vary is called
________ speed
Motion 4
Speed that does not vary is called
Constant speed
Motion 4
The picture indicates what kind of speed?
Motion 5
Instantaneous speedMotion 5
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 1
Velocity 2People on
Merry-go-rounds change velocity
becausethe _______ changes
Velocity 2
People on Merry-go-rounds change velocity
because
the direction changes
Velocity 3
DAILY DOUBLE1. What is the equation for
calculating velocity?
2. What does each variable stand for?
Velocity 3
DAILY DOUBLE1. v = d/t
2. v = velocity (speed)d = distance
t = time
Amy swam 50 m downstream in 25
seconds. What was her average
velocity?
Velocity 4
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
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
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/vConvert km to m 5 km = 5000 m
t = 5 km 120 km/h =0.042h= 60 min * 0.042 = 2.5 min
Acceleration is the rate at which _____
changes.
Acceleration 1
Acceleration 1
Acceleration is the rate at which velocity
changes.
The units of acceleration
are __________
Acceleration 2
The units of acceleration
are m/s2
Acceleration 2
Acceleration caused by uniform circular
motion is called ___________ acceleration.
Acceleration 3
Acceleration 3
Acceleration caused by uniform circular motion is
called centripetalacceleration.
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
t27 – 0 m/s
6 s = 4/5 m/s2
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?
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
A _______ is a push or a pull
Force 1
A Force is a push or a pull
Force 1
Forces that are equalin size, but opposite
in direction are called
_______ forces
Force 2
Forces that are equalin size, but opposite
in direction are called
balanced forces
Force 2
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 3
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 5Calculate the
resultant force for the following.
Force 5Calculate the
resultant force for the following.
______ _______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 1
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?