Physics
Physics
Problem
Which of the following statements best describes the term "free fall"? a) A body moving downward due to both gravity and air resistance b) A body descending with a constant speed irrespective of forces acting on it c) A body moving under the influence of Earth’s gravity alone, without any other force acting on it d) A body moving only under Earth’s gravity provided it is released from restIntuitive explanation
Free fall is about gravity acting alone—no other forces interfering. The key insight is that "free" doesn't mean "falling fast"; it means only gravity is doing the work. Whether an object is dropped, thrown upward, or even orbiting, if gravity is the only force acting on it, it's in free fall. This is why astronauts in orbit feel weightless even though Earth's gravity is still pulling them.
Intuitive explanation
Free fall is about gravity acting alone—no other forces interfering. The key insight is that "free" doesn't mean "falling fast"; it means only gravity is doing the work. Whether an object is dropped, thrown upward, or even orbiting, if gravity is the only force acting on it, it's in free fall. This is why astronauts in orbit feel weightless even though Earth's gravity is still pulling them.