You should find a more precise formulation. How many bodies are involved in Newtons III Law, and how many in your scenario?Ajit Kumar said:(a) Newtons III law : Every action has equal and opposite reaction
That is a very poor formulation of Newton's third law, which states that "When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body .Ajit Kumar said:(a) Newtons III law : Every action has equal and opposite reaction
It is totally wrong. The friction is not reaction to your push. What happens if you push something on ice? will not it move?Ajit Kumar said:By (a), if I apply a force of 10N on an object, it sholudnt move, as it has equal reaction, by friction of -10N so as to stop it.
Isnt that logic correct?
jfizzix said:The equal and opposite reaction is due to the second body acting on the first.
Another statement of Newton's third law for two objects A and B would be...
"the force on A due to B is equal and opposite to the force on B due to A"
If I push on a block of ice on a smooth floor, the ice will accelerate.
The forces on that block of ice, are:
-a large applied force due to my pushing,
-a smaller friction force in the opposite direction,
-gravity pulling down,
-and the smooth surface pushing up on the object, so that it does not sink through the floor.
However, as I apply a 10 N force on the block, the block is applying a 10 N force on me, pushing back on me exactly as much as I on it.
There might seem to be a sort of paradox here, but the important thing to consider is that it's only the forces acting on an object that will determine its acceleration. The forces it imparts on other objects have no direct effect.
You stated that you are pushing on an object with a 10N force.Ajit Kumar said:So what I am missed in my logic?
...or not, if there is also friction. The point you are missing, Ajit, is that the friction interaction is a second force pair. This is a very common misconception.jbriggs444 said:But that is a force on you, not a force on the object. The object is still subject to the 10N force and can still move as a result of that force.
There is a massive difference between conducting the experiment in deep space, where you can say there is only the 10N you apply and when the object is on a sticky table, where the 10N of friction force also is introduced.Ajit Kumar said:So what I am missed in my logic?
Newton's Third Law, also known as the Law of Action and Reaction, states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object will exert a force back on the first object that is equal in strength and opposite in direction.
Newton's Third Law applies to many everyday situations, such as walking, driving a car, or even sitting in a chair. When you walk, your feet push against the ground, and the ground pushes back with an equal and opposite force, allowing you to move forward. When a car accelerates, the wheels push against the road, and the road pushes back, propelling the car forward. When you sit in a chair, your body exerts a downward force on the chair, and the chair pushes back with an equal and opposite force, keeping you from falling through it.
No, Newton's Third Law is a fundamental law of physics and cannot be violated. In every interaction between two objects, the forces will always be equal and opposite, according to this law.
Newtown's Third Law is closely related to the concept of momentum. According to Newton's Second Law, the force applied to an object is equal to the rate of change of its momentum. Since action and reaction forces are equal and opposite, the change in momentum of one object is canceled out by the change in momentum of the other object, resulting in no overall change in momentum in the system.
No, Newton's Third Law is applicable to all types of forces, including non-physical forces such as electromagnetic and gravitational forces. It also applies to all objects, regardless of size or mass.