Newton S Second Law Of Motion — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Newton's Second Law of Motion Valid in inertial reference frames for objects with constant mass traveling at non-relativistic speeds. Defined as the rate of change of momentum: F = dp/dt Substitute p = mv Apply product rule: F = m(dv/dt) + v(dm/dt) Assume constant mass (dm/dt = 0) Result: F = ma Mass must be constant Velocity must be much less than the speed of light Must be applied in an inertial reference frame Force is required to maintain motion (confusing velocity with acceleration) F represents a single force rather than the net resultant force Mass and weight are the same property