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Rocket

Theme A - Space, Time & Motion

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Thermometer

Theme B - The Particulate Nature Of Matter

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Water Wave

Theme C - Wave Behaviour 

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Magnifying Glass Tilted Right

Theme D - Fields

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Microscope

Theme E - Nuclear & Quantum Physics

<ul>
	<li>Definition: The force that keeps an object from moving.</li>
	<li>Formula: Ff​ &le; &mu;s​FN​</li>
	<li>&mu;s​: Coefficient of static friction.</li>
	<li>The &ldquo;&le;&rdquo; symbol means the static friction force can vary from zero to a maximum value.</li>
	<li>Fun Fact! Ever tried pushing a heavy sofa and felt that initial resistance? That&#39;s static friction at work! The moment it starts moving, things change!</li>
</ul>

<ul>
	<li>Definition: The force acting once an object starts sliding.</li>
	<li>Formula: Ff ​= &mu;d​FN​
	<ul>
		<li>&mu;d​: Coefficient of dynamic friction.</li>
	</ul>
	</li>
	<li>It only works when surfaces are moving against each other.</li>
	<li>Ice Skating Example: When you first push off, you overcome static friction. As you glide, you deal with dynamic friction (though ice is super slippery, so it&#39;s minimal).</li>
</ul>

<ul>
	<li>Values of &mu;s​ and &mu;d​ change based on surfaces and conditions.</li>
	<li>Surfaces can be lubricated to reduce friction.</li>
	<li>Coefficients of friction don&rsquo;t have units.</li>
	<li>Some surfaces can have friction greater than the weight of an object!</li>
</ul>

<ul>
	<li>Tool : Measuring angles accurately.</li>
	<li>Calculations with fractions and trig ratios.</li>
	<li>Drawing and understanding free-body diagrams.</li>
	<li>Resolving vectors (two perpendicular components).</li>
</ul>

Static Friction Experiment

<ul>
	<li>Set up a ramp with the surfaces you&#39;re testing.</li>
	<li>Gradually raise the ramp until an object slides.</li>
	<li>The tangent of the angle between the ramp and the horizontal = &mu;s​.</li>
</ul>

Dynamic Friction Experiment

<ul>
	<li>Block of wood on a moving sanding belt.</li>
	<li>Add weights, measure friction with a newton-meter.</li>
</ul>

<ul>
	<li>Leonardo da Vinci mentioned friction in his notebooks.</li>
	<li>Guillaume Amontons contributed around 1700.</li>
</ul>

<ul>
	<li>Surfaces may look smooth but are filled with atomic peaks and troughs.</li>
	<li>For static friction, these atomic structures fit like puzzle pieces, resisting movement.</li>
	<li>Once movement starts (dynamic friction), surfaces glide over each other, causing less resistance.</li>
	<li>Lubricants can fill in these atomic structures, reducing friction.</li>
</ul>

<ul>
	<li>Slippery Skis: A skier places skis on a snow slope. Will they slide? Depends on the angle and friction coefficient. Our calculations say -&nbsp;Yes, they will slide!</li>
	<li>Speedy Hockey: A hockey puck slides across an ice rink. What&#39;s its speed as it reaches the goal? We&#39;d need to account for dynamic friction to figure that out.</li>
</ul>

Remember, while our explanations simplify the concept, friction originates from complex atomic interactions. It&#39;s like a secret handshake between surfaces at the atomic level! 🤝🔬

&nbsp;

Happy studying and remember, just like friction, sometimes you just need a little push to get moving! 🚀📚

Theme A - Space, Time & Motion

Uncover The Mysteries Of Friction Forces

Table of content

Static friction - holding everything in place 🛑

Dynamic friction - the slide begins 🛷

Friction facts 🤓

Physics tools 🔧

Unlock the Full Content!

Theme A - Space, Time & Motion

Uncover The Mysteries Of Friction Forces

Table of content

Static friction - holding everything in place 🛑

Dynamic friction - the slide begins 🛷

Friction facts 🤓

Physics tools 🔧

Unlock the Full Content!