The value that would be different for the hammer and the feather dropped from the same height is the the upward push of air resistance.
What is gravity?
The term gravity has to do with the force that is exerted on a body as a result of its presence in the earth's gravitational field. When an object s falling down, the acceleration due to gravity acts on the object.
We know that irrespective mass, the acceleration due to gravity is the same on all the objects that are on earth. This is because all objects are accelerated to the same extent on the earth's gravitational filed.
Thus, the value that would be different for the hammer and the feather dropped from the same height is the the upward push of air resistance.
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