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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?