Year 10 Physics
Describing Movement
Acceleration
A force made me do it
Action and Reaction
Falling down
Inertia
Distance
Displacement
Speed
Velocity
Average Speed
Measuring Speed
Graphing Movement
Distance-Time Graphs
Speed-Time Graphs
Calculating Distance
Acceleration and Deceleration
Calculating Acceleration
Calculating Speed
Acceleration and Graphs
Types of Forces
No Force and Not moving
No Force and Moving
Contact Forces
Non-contact forces
Acceleration, Mass and Force
Newton's Second Law
A matter of balance
Newton's Third Law
Weight
Gravity
Terminal Velocity
Weightlessness
Definition: how far you have travelled
How far across the room?
How far to your locker?
How far to the Gym?
How far is it to your house?
How far is it to Adelaide city?
How far is it to Melbourne?
How far is it to the Moom?
How far is it to the Sun?
How far is it to the nearest star?
How far is it across the Milky Way?
653 km
17 km
384403 km
150 million km
39,900,000,000,000 km or 3.45 light years
Definition: how far you have travelled and in which direction?
What direction is your locker?
What direction is the Gym?
What direction is Adelaide city? 
Symbol: x
Units: metres
Abbreviated to: m
Definition: the distance you cover in a certain time period.
For example: if you run 100 metres in 10 seconds = 100/10 = 10 m/s
If you drive a car 160 kilometres in two hours = 160/2 = 80 km/hr
Examples
Symbol = v
Formula v = distance divided by time
Units in Physics: m/s
Convert km/hr to m/s by dividing by 3.6
Example 60 km/hr = 60/3.6 = 16.7 m/s
For example if you travelled 500 metres in 20 seconds.
v = d/t
v = 500/20 = 25 m/s

Question: how can we measure how fast cars are travelling
outside along Surrey Farm Drive?
Defintion: velocity is displacement over a particular time period.
Symbol = v
Formula v = displacement divided by time
Units in Physics: m/s
Convert km/hr to m/s by dividing by 3.6
Speed of Sound = 346 metres per second (m/s)

Speed of Light =  299,792,458 (m/s) 

or 1245.6 km/hour
or 0.346 metres per second
or 10,792,528,488 km/hr
300,000 km/second
(See videos called: Sonic Boom and super fast jets) 
See video: Measuring a constant velocity with a ticker timer
Show video: Schwepps burst slow motion balloon ads.
Procedure: how to use a ticker timer:

a Thread a short length of ticker-tape through the ticker-timer. If there is a carbon paper disc, make sure the tape goes underneath the disc.
 
b Turn the ticker-timer on for a few seconds. It vibrates rapidly and hits the top of the carbon paper. It makes a lot of dots on the tape, at regular intervals.
 
c Remove the tape from the ticker-timer. If the tape didn't move when the ticker-timer was switched on, then all the dots will be in the same place.
 
d Thread a longer piece of ticker-tape, about 1 metre long, through the ticker-timer. Switch the ticker-timer on. Pull the tape slowly through the ticker-timer.
 
e Check the tape to see if you can see each individual dot, with a space between. We can say that each dot-to-dot space stands for a 'tick' of time.
 
f Thread another 1 metre piece of tape through the ticker-timer.
 
g You need a 'start' signal and a 'stop' signal. These could be handclaps by one of your group or by your teacher. They should be just a few seconds apart. Pull the tape slowly and switch the ticker-timer on at the start signal. Switch it off at the stop signal.
 
h Count the number of dot-to-dot spaces between the start and the stop. That is the time between the signals, measured in 'ticks'.
 
i Use a fresh piece of tape, and a stopwatch or stopclock. Pull the tape through the ticker-timer for 3 seconds. Find out how many 'ticks' there are in 3 seconds. Find out how many there are in 1 second. Work out the time in seconds that is the same as 1 tick. 
Reaction time and distance
Definition: the time it takes for a person to react
Can be up to 1 second in humans
If you are travelling at 60 km/hr 
how far will you travel in the one second before you apply
the brakes?
Hint: convert to m/s (divide by 3.6)
When you are affected by alcohol
reaction time can slowed to 3 seconds.
How far will you travel before applying
your brakes.
16.7m
50 m
Watch video - "Reaction time"
How far would you travel if you
were driving at 300 km/hr?
(Try Drag Racing Game (Open with Firefox)
Definition: rate of increase in speed
Definition: rate of decrease in speed
Show video : Harrier Jet Take Off
Show Deceleration comparison video
ShowVan brakes too heavily video
Symbol: a
Measured in metres per second per second
Units: m/s/s or ms
-2
Use final speed = starting speed + acceleration by times
or
v = u + at
v can also be final velocity; u can symbolise starting velocity
All acceleration requires a force. Bigger forces produce higher accelerations.
However, mass also is important.
Thrust is caused by gases or liquid being pushed
out the rear of an engine, jet or rocket.
Friction acts between any two surfaces that try to slide over one another. Friction acts in the opposite direction to the movement or attempted movement.
Air resistance and drag are caused by friction between air (or liquid or other gases) and a moving object. Like friction, it acts in a direction opposite to the movement.
Buoyancy is floating force. It acts upwards, opposing the weight force.
• Surface tension is built up from tiny forces between particles on the surface of a liquid. These forces form a ‘skin’ on the liquid.
• Lift is caused by air moving over a wing or airfoil. It acts at 90 degrees to the surface of the airfoil.
Electrostatic force is the force of repulsion of like charges (+/+ or –/–) or attraction of unlike charges (+/–).

Weight is caused by gravity. It acts downwards, towards the centre of the planet.
Magnetic force is the force of repulsion of like poles
Mr Magnetism
Newton's First Law of Motion
Anything at rest will stay that way
unless pushed or pulled.
Newton's first law:Anything that is moving will keep moving at the same speed and in the same direction unless a force changes it.