laws of motion

 NO MATTER HOW  QUIET OR CALM IT MIGHT SEEM ,NOTHING IN 

OUR WORLD IS EVER STILL. DEEP INSIDE EVERY OBJECT , EVEN IN

THE AIR  THAT SURROUNDING US , ATOMS AND MOLECULES ARE 

RESTLESSLLY .

all motion - even the random dance of atoms - is caused by forces pushing and 

pulling . forces act logically, so most things in the world move in ways we can  understand and 

predict . for this ,we use the three laws of motion : a simple set of scientific rules first

thought up over 300 years ago.

first law of motion

ALL THING WILL EITHER STAY STILL OR MOVE WITH ASTEADY

SPEED UNLESS A FORCE ACT ON THEM . THIS IDEA IS CALLED INERTIA.

THE MORE MASS SOMTHING HAS , THE MORE  INERTIA IT HAS TOO - SO IT

WILL BE MOR LIKELY TO STAY STILL OR RESIST CHANGES TO ITS MOTION.

SECOND LAW OF MOTION 

when a force acts on something , it makes it accelerate (go faster, or change direction .)

the amount of acceleration depends on size of the force and the mass of the object . 

the bigger the force or the lighter the object , the more it accelerates.

third law of motion 

newton third law says that when a force acts on something , there is always another

force just as big acting in the opposite direction. if the original force is called the 

reaction . that why the third law is often written in a shortened form every action

has an equal and opposite  reaction .