We physicists claim that all objects will fall with the same acceleration when acted upon only by gravity (free fall). Any deviations from this law get blamed on air resistance. In case you’re skeptical of these assertions, one of the most expensive introductory physics demos in history was conducted during an Apollo landing on the moon.
Astronauts dropped a feather and hammer to show that both experienced the same acceleration in the absence of air. Though the video quality is not the best, it’s is a neat demonstration. My favorite part is when the astronauts look like they’re dancing with excitement after the drop.