Where is my hammer free1/6/2023 ![]() A heavy object (a 1.32-kg aluminum geological hammer) and a light object (a 0.03-kg falcon feather) were released simultaneously from approximately the same height (approximately 1.6 m) and were allowed to fall to the surface. "During the final minutes of the third extravehicular activity, a short demonstration experiment was conducted. ![]() Mission Controller Joe Allen described the demonstration in the "Apollo 15 Preliminary Science Report": Because they were essentially in a vacuum, there was no air resistance and the feather fell at the same rate as the hammer, as Galileo had concluded hundreds of years before - all objects released together fall at the same rate regardless of mass. He held out a geologic hammer and a feather and dropped them at the same time. At the end of the last Apollo 15 moon walk, Commander David Scott (pictured above) performed a live demonstration for the television cameras.
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