What are Newtons three laws of physics please?
1st – A particle will remain in its current state unless acted upon by an unbalanced force. 2nd – A particle acted upon by unbalanced forces will experience an change in momentum in the direction of the resultant force and a magnitude proportional to the resultant force. 3rd – A body that is acted upon by unbalanced forces will also exhibit the exact, opposite, and collinear resultant force upon the initiating body. The second law can be expressed mathmatically as F = Dp where F = force and Dp = the change in momentum. Momentum is defined as mass multiplied by velocity. Thus for a non-changing mass system (Particle) F = mA. Again F = force, m = mass and A = time rate of change of velocity. Velocity is a vector quantity and is speed with direction. For a particle to change direction or speed, an unbalanced force must be applied to it. However in rocket propulsions the mass of a system changes and must be included in the calculation to recieve accurate results. The first and third laws a
