In free fall, all objects accelerate at the same rate regardless of their mass. This principle demonstrates that, without air resistance, heavier and lighter objects will fall together. Galileo's experiments helped clarify this concept, debunking the myth that mass affects falling speed. ;
In free fall, all objects fall at the same rate due to the constant acceleration of gravity, approximately 9.81 m/s², regardless of their mass. Galileo's experiments demonstrated this principle, showing that mass does not influence falling speed in the absence of air resistance. Therefore, the correct answer is D: All objects fall at the same rate, regardless of their mass.
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