If we neglect the effects of air friction, which would hit the ground first if dropped from rest, a 5 pound body or a 1 pound body?
David Scott of Apollo XV dropping a hammer and a feather simultaneously on the moon in 1971:
https://www.youtube.com/watch?v=dCoU0NHxAp8
(There are people to this day who will claim that this video was fake, since if it was real it would also destroy their belief that the whole moon landing was fake. They are the same people who also deny climate change)
As Galileo showed, both would take the same time.
To determine which object would hit the ground first when neglecting air friction, we can use a basic principle in physics known as the law of free fall. This principle states that in the absence of air resistance, all objects, regardless of their mass, will fall with the same acceleration due to gravity.
The acceleration due to gravity on Earth is approximately 9.8 meters per second squared (m/s^2). This means that every second an object falls, its velocity increases by 9.8 meters per second.
Since the acceleration is the same for both objects, the one-pound body and the five-pound body will experience the same acceleration due to gravity. As a result, both objects will hit the ground at the same time.
In summary, neglecting air friction, the one-pound body and the five-pound body will hit the ground simultaneously when dropped from rest. The law of free fall ensures that their masses do not affect the time it takes for them to reach the ground under this condition.