I mean your average party balloon, when it’s completely deflated, it seems you have to put extra effort into getting it going. As soon as it starts inflating, you need less effort.
In: Physics
Since there’s nothing stretching the balloon, it’s at its thickest point, which means that you have to stretch it out first. Once it is stretched out, it’s easier to stretch it bit by bit. When there’s air in the balloon already, adding more air is easier because the balloon is still being stretched out by the air you put in at the start.
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