Question

F1.2=F2.3===>F1.2=F3.2

which law of Newton ?

Answer 1

Hope this helps...

Answer 2

“Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion. Any change in motion involves an acceleration, and then Newton's Second Law applies; in fact, the First Law is just a special case of the Second Law for which the net external force is zero.” – http://hyperphysics.phy-astr.gsu.edu/hbase/newt.html.

Answer 3

Newton’s Second Law of Motion. It states, the force acting on an object is equal to the mass of that object times its acceleration.

Answer 4

“Newton's third law: All forces in the universe occur in equal but oppositely directed pairs. There are no isolated forces; for every external force that acts on an object there is a force of equal magnitude but opposite direction which acts back on the object which exerted that external force.” – http://hyperphysics.phy-astr.gsu.edu/hbase/newt.html.