sir/madam, i didn't understand how the feather and stone fall at the same speed even though the stone is heavier.i dont think vaccum creates much difference as gravity has the same force on every object.please answer me soon.
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It creates difference because when both are dropped together the air exerts viscous force which lowers the speed of feather but if we make them to fall in vaccum they will fall at same time
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The speed at which an object falls down depends on two factors, acceleration due to gravity and air resistance. If you would drop a feather and a stone from the same height on earth, the gravity exerts same force on both them, so they are expected fall at same speed. But, since more air resistance acts upon the feather as compared to the stone, it falls slowly. But if you would do the same experiment in vacuum, there is no air resistance as there is no air. So, gravity will exert same force on all objects and they will fall at same speed.
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