101.F07.lecture2

101.F07.lecture2 - P H Y 1 1 : H o w t h e w o r l d w o r...

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Unformatted text preview: P H Y 1 1 : H o w t h e w o r l d w o r k s I Sid Nagel e t o r t o i s e a n d t h e h a r e : O n e- d i m e n s i o n a l m o t i o n Q u i c k r e v i e w : W h a t i s p h y s i c s ? Its knowledge of nature. What is nature? Its matter and its energy. They are indeed related. How does one piece of matter interact with another piece matter in terms of a few fundamental laws? W h a t i s m a t t e r ? Matter is made up of atoms (and a few other things). But what then are atoms? Atoms are made up of electrons, protons and neutrons. wikipedia.org M a t t e r i n m o t i o n Forces can cause matter to accelerate . What is acceleration? It has something to do with motion. Lets start from the beginning....How do we describe the motion of an object? (1) Describe an object (2) Describe the objects position (3) Describe the objects position as a function of time, i.e. motion D e s c r i b i n g a n o b j e c t For our purposes, an object is described by (1) its total of amount of matter, otherwise known as mass, and by (2) the position of its center of mass Center of massthe objects mass acts as if it were concentrated at a point P...
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101.F07.lecture2 - P H Y 1 1 : H o w t h e w o r l d w o r...

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