What is the best explanation of Newton’s laws?

Newton ' s laws of motion are three fundamental principles that describe the relationship between the motion of an object and the forces acting on it . The first law , also known as the law of in ert ia , states that an object at rest will remain at rest , and an object in motion will continue in motion at a constant velocity , unless acted upon by an external force . The second law states that the force acting on an object is equal to the mass of the object multi plied by its acceler ation . The third law , also known as the law of action and reaction , states that for every action , there is an equal and opposite reaction . These laws are fundamental to our understanding of the physical world and have numerous applications in fields such as engineering , physics , and astr onomy . </s>