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# Forces and Motion

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## Paul Sheffield

on 27 September 2013

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#### Transcript of Forces and Motion

Forces and Motion
L.O
Velocity time graphs
Acceleration

How are velocity time graphs and distance time graphs different?
in your groups describe what the following show on a velocity time graph
horizontal line
vertical line straight down
upwards curve
down wards curve
Acceleration and deceleration
http://www.bbc.co.uk/learningzone/clips/land-speed-record/13187.html
http://www.bbc.co.uk/learningzone/clips/speed-time-graphs/10673.html

Ticker tape timers
one dot every 1/50 second
1 dot = 0.02 seconds
10 dots = 0.2 s
5 dots = 0.1 s
length of 5 dots/ 0.1= speed (m/s)
The piece of tape in the diagram is 5 SPACES long.
Each space is 1/50 s so five spaces will be 5/50 s or 1/10s.
So the piece of tape went through the timer in 1/10s. The piece of tape is 7 cm long.
If 7cm of tape go through in 1/10 s then 70cm will go through in 1 s.
The speed is then 70 cm/s.
which object is:
accelerating?
decelerating?
Constant speed?
fastest?
Starter