The weight

How do you feel when you start down the elevator? At the first moment of movement, when the floor under your feet is already lowered, and you did not have time to purchase the same speed yourself, the weight of the body is small. A moment passes and the strange sensation ceases; your body, trying to fall faster than the evenly moving elevator, presses on its floor and, therefore, the body weight again becomes palpable.

Hang weight to the hook of the spring balance and watch where the pointer moves, if the balance with the weight is quickly lowered down

Hang weight to the hook of the spring balance and watch where the pointer moves, if the balance with the weight is quickly lowered down. You will be sure that during the fall the pointer shows not the full weight of the dumbbell, but much less! If the scales fell freely, and you had the opportunity, during the fall, to follow their pointer, you would notice that the weight of the dumbbell when falling is zero.

The weight of the heaviest body becomes zero throughout the time that it falls. It is easy to understand why this is so. Body weight is the force with which the body pulls the point of suspension or presses on its support. But the falling body does not produce any tension of the spring of the balance, since the spring is lowered together with it. Therefore, to ask about what body weight, when it falls, is the same as asking: how much does the body weigh, when it does not weigh?

The following experiment clearly confirms the correctness of these arguments. For one cup of trading scales, put the tongs to crack the nuts so that one knee rest on the cup, the other tied the thread to the hook of the rocker arm. On the other cup, place as much weight as possible so that the balance is in balance. Bring a lighted match to the string; The thread will burn out, and the upper knee of the forceps will fall on the cup. At the same time, it, although it remains in conjunction with the lower, still presses on it less than in a stationary state. The weight of the forceps is momentarily reduced, and the cup naturally rises.

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