Which of the three laws deals with interactions?
Newton's three laws of motions are good foundation for classical mechanics.in newton's three laws he describe about the relationship between a body and force acting upon it and also motion with respect to the forces. Newton’s first law of motion:an object at rest and an object in motion stays in motion with the same speed and in same direction unless an external force acting on object.sometimes it also refers to law of inertia. Example:if you are in a car,moving at 400 km/h you are also moving in 400 km/h and If driver suddenly applies the brake,you will slide forward and then slam back.otherwise you will move in constant velocity. Newton’s second law of motion: According to newton's second law net force acting on any object is given by the product of mass and acceleration acting on that object. Example :throwing a football.it travels in the direction of the line of action of throw’s force at speed that is inversely proportional to football mass and directly proportional to the force. Newton’s third law of motion:for every action there is an equal and opposite direction.the statement means in every interaction,there is a pair of forces acting on two objects.the size of the force on first object equals to the size of force on second object. Example:as you sit in your chair,your body acts on the chair with one force,and the chair reacts on your body with yet another force.