Newton's laws of motion
Newton's second law states that acceleration of a particle is dependent on the forces acting upon the particle and the particle's mass. For a given particle, if the net force is increased, the acceleration is increased. It's also stated that the rate of change of momentum of a body is directly proportional to applied force and takes place in the direction in which the force act. For a given net force, the more mass a particle has, the less acceleration it has.