Free fall is the motion of an object falling under the influence of gravity alone, without any air resistance or other forces acting on it. In this state, all objects accelerate towards the Earth at the same rate, approximately 9.81 m/s², regardless of their mass. This means that a feather and a hammer, if dropped in a vacuum, would hit the ground simultaneously. During free fall, an object experiences weightlessness, as there is no support force acting on it. This phenomenon can be observed in space, where astronauts experience free fall while orbiting the Earth. Free fall is a fundamental concept in physics, illustrating the effects of gravity on motion.