Newton's Second Law:This law states that the acceleration of an object is directly proportional to the net force applied and inversely proportional to its mass.
Equilibrium:Equilibrium occurs when there is no net force acting on an object, resulting in zero acceleration. The object can be at rest or moving with a constant velocity.
Friction: Friction is the force that opposes motion between two surfaces in contact. It acts in the opposite direction to the applied force and affects the net force acting on an object.