1. Video

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{| width="500px" cellspacing="10px" align="center" border="1"
{| width="500px" cellspacing="10px" align="center" border="1"
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| [[Image:fig a.GIF]]
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| '''The Bike Question'''
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| valign="top"| Modelling the bike as a particle can provide an explanation for the fact that it moves backwards when pulled backwards.
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Modelling an object as a particle is an idealisation (or abstraction) which can be useful in many cases.
 
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| [[Image:Bike.JPG]]
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|valign="top"| Modelling the drum as a particle can explain what happens if the string is horizontal, but not what happens if the string is vertical.
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| valign="top"| If you are unable to do the bike experiment for yourself, try watching in on the link below.
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Beware of potential problems when modelling objects as particles.
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http://www.youtube.com/watch?v=DGTe5T4LIZY
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| [[Image:fig c.GIF]]
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| '''The Drum Question'''
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|valign="top"| Write down a simple definition of a force in your own words.
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| [[Image:fig drum2.jpg]]
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|valign="top"| Exploring the effects of gravity on objects can help create a definition of a force.
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|valign="top"| If you are unable to do the drum experiment for yourself, try watching in on the link below.
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| [[Image:fig e.GIF]]
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|valign="top"| Gravity can change the motion of a ball in a number of ways.
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|valign="top"| A force is something that causes a change to the motion of a body.
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|valign="top"| Newton’s first two laws are based on an understanding of this idea of how a force changes motion.
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|valign="top"| In the first car the resultant force is in the direction of motion and the car gains speed.
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In the second case the resultant force is zero and the car travels at a constant speed.
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http://www.youtube.com/watch?v=O5vvSJjqTOU
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In the third case the resultant force is backwards and the car slows down.
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| '''The Rolling Cans'''
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|valign="top"| In the first case the resultant force is upwards. As the parachutist is also moving downwards, he slows down.
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In the second case the resultant force is zero and the parachutist moves with a constant speed.
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| [[Image:cans1.jpg]]
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|valign="top"| The resultant force is always downwards.
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|valign="top"| An interesting experiment involves the comparison of the motion of two tin cans when they roll and slide. This is an experiment that you could carry out yourself, or you could watch at the link below.
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If the resultant force were zero at the highest point, the ball would stay there!!
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http://www.youtube.com/watch?v=Vx6he1pDtes
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| [[Image:fig m.GIF]]
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| '''Brainiac Eggsperiment'''
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|valign="top"| No, the motion is changing from downwards to upwards.
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| [[Image:brainiac.jpg]]
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|valign="top"| This is a great experiment that demonstrates Newton’s First law of motion. Watch and enjoy at the link below.
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The resultant force is upwards, for almost all of the time that the ball is in contact with the table.
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http://www.youtube.com/watch?v=HGuIFPxuwrU
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|valign="top"| The direction of the motion is always changing, so the forces are not in equilibrium.
 
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|valign="top"| [[Image:fig t.GIF]]
 
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Current revision

       Introduction          Video      


The Bike Question
Image:Bike.JPG If you are unable to do the bike experiment for yourself, try watching in on the link below.

http://www.youtube.com/watch?v=DGTe5T4LIZY

The Drum Question
Image:fig drum2.jpg If you are unable to do the drum experiment for yourself, try watching in on the link below.

http://www.youtube.com/watch?v=O5vvSJjqTOU

The Rolling Cans
Image:cans1.jpg An interesting experiment involves the comparison of the motion of two tin cans when they roll and slide. This is an experiment that you could carry out yourself, or you could watch at the link below.

http://www.youtube.com/watch?v=Vx6he1pDtes

Brainiac Eggsperiment
Image:brainiac.jpg This is a great experiment that demonstrates Newton’s First law of motion. Watch and enjoy at the link below.

http://www.youtube.com/watch?v=HGuIFPxuwrU

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