# Newton’s Laws of Motion

First law: There exists at least one reference frame in which the velocity of a point particle remains constant unless the particle is acted upon by an external force; Second law: The acceleration $latex \vec{a}$ of a body is parallel and directly proportional to the net force $latex \sum \vec{F}_i=\vec{F}_{tot}$ and inversely proportional to the … Continue reading Newton’s Laws of Motion