You get into an elevator (or a lift, as we sometimes call it) and for a second or two, just as the elevator moves down, we feel weightless. On the other hand, if we go up in an elevator, we suddenly feel heavier just as the elevator lurches upwards.
To understand this feeling of weightlessness, we need to understand a few basic things first.
Mass: The amount of matter that constitues us results in our mass....
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