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This answer has nothing to do with physics, but I was taught in grade school - and, yes, this was in an actual elementary school text - that the Fahrenheit thermometer was based on the coldest and hottest days in 1714 in Holland where he lived. I have never been able to verify that, so I assume it was false, but the temperatures of zero and 100 do represent ...


In a tug of war, why does the stronger side, pulling with more force, win? Both sides are pulling against each other, but in the end one always finds itself being dragged along. It's the same principle here - each side of the pencil is being pulled towards the earth. Both sides would like to fall, but your finger prevents them - it plays the role of the ...


Your finger+pencil form a lever. Your finger is a Hinge. The pencil is a Beam (structure). The mass is distributed in the beam (pencil). The gravity pull the beam (pencil) at each side of the lever down. As consequence of the coherence of (beam) pencil and the presence of the hinge (your finger), the more heaviest side "wins" and the other side "lose".


I'm assuming you haven't taken any physics courses, so let's start by explaining the concept of a force. Forces are the central focus of classical mechanics. Basically, a force is a push or pull on an object as a result of its interaction with another object. When applied to an object with mass, a force causes the object's velocity to change in some way. ...

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