A pendulum is constructed from a 1.0-kg mass suspended from the ceiling, with a length of strong string long enough so that, when pulled about 40o from the vertical, the mass comes to nose level. Continue reading
You can have a ton of science fun with a straw. You can make it into a blow gun, using the properties of air, or it can double as a pipette when your lab has run out. But did you know you can perform some awesome hands-on science with the straw’s wrapper, too? It’s true. With the Wrapper Worm, we’ll reveal how to turn an ordinary straw wrapper into a growing worm!
SICK SCIENCE APPAREL NOW AVAILABLE! Click here: http://spanglersci.com/SickScienceApp…
Find out why this works here: http://www.stevespanglerscience.com/l…
Want more experiments like this? Check out http://www.stevespanglerscience.com/p…
A gear is a toothed wheel that connects or meshes with another gear. It is used to transmit forces in machines that range from something as small as a watch to something as large as the locks on a river system. Continue reading
Friction is the force that resists the movement of one material over another. It occurs when objects rub against each other. Friction is a force that is beneficial for many everyday activities, such as walking without slipping, the operation of brakes for vehicles, or writing on a chalkboard.
Some of the harmful effects of friction include the wearing out of shoes and clothing because of rubbing together, overheating of machine parts because of too much friction or increased work because extra force is needed to overcome friction.
It is often possible to increase or decrease the amount of friction between two surfaces. Friction between two surfaces can be reduced by making the surfaces smoother or by adding a lubricant such as oil, grease, soap or wax between the surfaces.
If you’ve ever taken a trip to Norway then you know what a fjord is–a long narrow body of water with very steep sides making crossing them quite the challenge. Norway’s coastline is 2,500km, but if you count the fjords it skyrockets to 29,000km. So basically, there’s a lot of them.
If you want to travel in a car from the north to the south of the country it will require several ferry trips to get across the fjords. This adds hours to a journey, and it’s a problem the Norwegian government wants to fix without the population opting to fly everywhere or use longer travel routes.
For more on yo-yos check out: http://bit.ly/290wR3a
How to yo-yo without a string attached… So many crazy tricks and the science that makes it possible.
Edited and animated by Daniel Joseph Files
This is dedicated to those who feel that Physics is a Human endeavour and should be taught as such.
The first and most primeval method of opening bananas (close to the evolutionary level of blue green slime) is the Grunt Method [Action, Hold the banana, wrapped around the waste, Grasp it with both hands. Throw the elbows out away from your body. The banana breaks in half if done right with a not too ripe banana] This method is preferred by those who end up in administration or politics.
The second step up the evolutionary ladder is the method used by Homo Sapiens. [Action, Grab the stem end, bend and twist and mash the banana. Look for a knife. Look totally frustrated] Human do need their tools.
The third step up the evolutionary ladder is the method (or so I’m told) used by the Great Apes [Action, Pinch the other end (opposite the stem end) and just peel the banana.] It works so easily, its weird.
The forth step up the evolutionary ladder is the method used by Technological Homo Sapiens. or The Zipper Method [Action, take the banana and insert finger nails into one of the ribs on the concave side of the banana. Then just pull apart and zip open the banana.]This method was shown to me by a ten (if some what talented) year old.
Finally! The Pinnacle of Evolution, the Physicists Method [Action, Grab the stem end, concave side, toward you, with a quick flip of the wrist, the stem breaks allowing you to easily peel the banana] Don’t get too enthusiastic or the banana ends up on the floor.
The Moral of Our Story – “A banana will continue in a state of uniform motion unless peeled by a net external force!” Thank You! Mr. Newton
One can go on to describe how Physics – the study of Matter and Energy – is responsible for us being richer than the Nobility of Europe a few hundred years ago. They may have eaten off golden plates, and had servants catering to their slightest needs, BUT THEY DID NOT EAT BANANAS because they did not understand the energy involved in the changes of state of matter. Nor were they able to efficiently harness the various forms of energy available to them. How many horses did they use to drag themselves around?; Two, four, maybe eight! What is the horsepower of our smallest cars? We are richer than 19th century European nobility, and Physics is responsible. [Action; Look Righteous, Superior, —> then Smile]
This material has been provided by :
Jim Smedley (and Julian Faust, age 10 at the time) described by Dave Erb
Permission is hereby given to use this material for non profit, classroom use..
A wheel that spins forever; a bird that never quenches its thirst; a clock that never stops ticking, an endless source of free energy. These are but the dreams of inventors striving to make perpetual motion machines, machines that can work forever without any energy input. Are these machines possible without violating the laws of physics? No.
Unbalanced wheel designed, laser cut and assembled by engineer Kyle Kitzmiller – kylekitzmiller.com