Why do objects fall at the same speed in free fall?

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Objects in free fall experience the same acceleration due to gravity, regardless of their mass, as long as air resistance is negligible. This principle holds true when one object has a significantly smaller mass compared to the gravitational source, like a planet. However, if two objects have comparable masses, their mutual gravitational attraction can affect their motion, complicating the scenario. The discussion emphasizes the importance of context and frame of reference in understanding gravitational interactions. Ultimately, while the statement that "all objects fall at the same speed" is generally accurate, it requires specific conditions to be fully valid.
  • #31
mfb said:
It depends on the sum. arel=G(M+m)/R2.
Oops, yes you are right. The reduced mass gives the equivalent force for a 1 body problem.
 

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