F=ma (Newton's Second Law)

Newton's Second Law, expressed as F = ma, states that the force acting on an object is equal to its mass multiplied by its acceleration. This means that heavier objects (greater mass) require more force to change their motion, and the amount of change in speed or direction (acceleration) depends on the force applied. In practical terms, pushing a car requires much more effort than pushing a bicycle because the car has more mass. The law provides a precise way to predict how objects move when forces are applied, fundamental to understanding physics and engineering.