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2015-03-23T21:19:21+08:00

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Physics is the study of the interaction between matter and energy.

Speed
   · The term used to describe the distance traveled per unit of time.

   · s =  \frac{d}{t}

Force
   · May be simply defined as a push or a pull.
 
   · F = ma

Acceleration
   · The change in velocity of an object at a given time.
 
   · a =  \frac{ v_{f} -  v_{i}  }{t}
 
Work
   · Force applied through a distance.
   
   · w = Fd

Power
   · The rate of doing work

   · P =  \frac{Fd}{t} or  \frac{w}{t}

Energy
   · The ability to do work
 
        1.) Gravitational Potential Energy
                · The energy possessed by a body due to its position with respect to              the ground.
                
                · E_{gpe} = mgh
         
        2.) Elastic Potential Energy
                · The energy possessed by a spring or rubber band when stretched                or compressed.

                ·  E_{pe}  =  \frac{1}{2}k x^{2}
  
         3.) Kinetic Energy
                 · The energy of an object due to its motion.
  
                 ·  E_{ke} =  \frac{1}{2} m v^{2}
            


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2015-03-26T22:20:16+08:00
Physics is the branch of science that deals with the study of matter,and energy.different equations are used in physics.1.speed--distance travelled .in unit time,that is s=dist/time s=d/t 2. velocity--rate of change of displacement  .v=d/t its avector quantity.it shows both magnitude   and direction. 3.accelaration---rate of change of velocity  acce.=velocity /time.Energy is the capacity to do work.kinetic and potential ere the main energies.kinetic energy is energy possed due to its movement.potential energy is the energy possessed due to its positon ,strain rest
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