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Sobota, 4. júla 2020
Mechanical motion
Dátum pridania: 21.08.2006 Oznámkuj: 12345
Autor referátu: boardgirl
 
Jazyk: Angličtina Počet slov: 234
Referát vhodný pre: Gymnázium Počet A4: 0.7
Priemerná známka: 2.99 Rýchle čítanie: 1m 10s
Pomalé čítanie: 1m 45s
 
Mechanical motion-when we observe the physical objects,we find out that some of them change their position,they arein motion in reference to the other objects.. Trajectory-is sum of all positions in which a particle is found,It is linear or curved line-a)linear motion b)curvilinear motion..Mechanics is divided into two parts-kinematics and dynamics.Distance is simply the total path traversed in moving from one location or point to another.A sacalar is quantity that can be represented by a single number,numerical value-called its magnitude,along with unit of measure.

A scalar has only size ,it has no directional properities-distance ,mass. Vector is quantity that has both a size- magnitude,and the direction.We define displacement as the straight line distance between two points,along with the direction.The d is the sum of two vectors d1 and d2 and we call it the resultant of d1 and d2..In uniform motion,a particle travels the same distances in equal time intervals.s=v*t,v=s/t.In most cases the motion of a particle in nonuniform,meaning that different distances are covered in equal time intervals.Concerning the nonuniform motion,we define average sped Vp=s/t,t2-t1=tdelta,v=s2-s1/t2-t1=s delta/t delta.If the time t delta considered becomes smaller and smaller and approaches zero,the speed calculation gives an instantaneous speed
 
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