This is a unit which really many find quite difficult. To help yourself out you must learn Newton’s 1^{st}, 2^{nd} and 3^{rd} law of forces. Without this knowledge you cannot succeed in explaining or reasoning out most questions. Also there is a basic principle of coplanar forces producing a resultant and therefore acceleration. It is simple as it is…

Big – Small = Resultant in the Direction of Big!

There is an easy way to remember the laws….

1) Inertia – “Objects” – don’t want to move but when moving find it difficult to stop

2) F=ma – or ratio F/m = a which is more appropriate. The acceleration on a fat person is found as the ratio of the force of the push to the mass of the person

3) Opposites – for every force their is an opposite. Fat person on chair pushing down, chair pushes up to support weight with equal and opposite force.

Simple idea of F=ma shows that Big-Small = acceleration in direction of Big.

So F = ma ............... T - mg = ma etc....

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AS_9_2_Pully Explaination.flv

Simple idea of F=ma shows that Big-Small = acceleration in direction of [...]

Simple idea of F=ma shows that Big-Small = acceleration in direction of Big.

So F = ma ............... T - mg = ma etc....

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F=ma, The Mechanics Revision Song by Mr Chadwick

Mr Chadwick and his Further Maths Class singing the Mechanics Revision [...]

Mr Chadwick and his Further Maths Class singing the Mechanics Revision Song. Learn it and you can pass M1. guaranteed.

Lyrics: When the force on one side's more than the other side, ...F=ma.

If the speed seems to change in an up or down way F=ma.

If there's string, just one piece of string, that are connecting, 2 or more a thing, there is tension.

It is the same all a through the way, all a through the way, make a no mistake, the same tension.

Just resolve up the plane, down the plane, in the way of the motion.

Perpendicular forces we must-a ignore as we go.

It is Newton's whose law you must not-a ignore when there's motion.

F's miu r when you are on rough sides or inclines F=ma.[+] Show More

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Westminster Bridge London Eddy Currents

Great video on Westminster Bridge, shows the of ripple waves, creating an [...]

Great video on Westminster Bridge, shows the of ripple waves, creating an interference pattern on a bridge support.

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Newton's Third Law Part 1 Physics Lessons

http://www.physicshelp.ca GO AHEAD and click on this site...it wont hurt. [...]

http://www.physicshelp.ca GO AHEAD and click on this site...it wont hurt. Free simple easy to follow videos all organized on our website Key Words: Newton's third 3rd law dynamics mechanics free body diagrams physics ... lesson help fbd explained action reaction applied force[+] Show More

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A Common Misconception about Newton's Third Law Force Pairs (or Action-Reaction Pairs)

Proof that the Force Normal and the Force of Gravity are not a Newton’s [...]

Proof that the Force Normal and the Force of Gravity are not a Newton’s Third Law Force Pair.

0:00 Intro 0:26 Drawing the Free Body Diagram 1:02 Not a Newton’s Third Law Force ...Pair 1:37 The Force Normal Force Pair 1:55 The Force of Gravity Force Pair

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