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rvgene
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Ok, so the trick is shown in the following link...
could anyone explain how this is accomplished?
could anyone explain how this is accomplished?
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Consider each person individually as an object resting on two supports. The weight of each person is supported by 1.) their own legs from the knees down, and 2.) the legs, from the knees down, of the person on whose knees their back is resting. The center of gravity of each person is somewhere between their knees and the point where their back touches the next persons knees, though it is much closer to the latter. I just experimented with getting myself into this position with my back resting on the seat of a chair. If you try that you'll see there's much more pressure on your back than on your feet. In the group situation each person's knees are supporting a little bit of their own weight and most of another person's weight. If you could determine the center of gravity of each person in this position you could work out how much of their weight is supported by their own knees and how much by the knees of the next person.rvgene said:hmm, does it have to do with concepts such as centre of gravity and moments?
for example, the pivot is at the head, and there is a anticlockwise moment due to the centre of gravity and a clockwise moment due to the normal force at the feet?
The "4 person chair trick" is a classic physics demonstration where four people are able to lift a fifth person using only four chairs and their own strength.
The trick works by distributing the weight of the person evenly across the four chairs, making it easier for each person to lift a portion of the weight. This is possible due to the principles of leverage and weight distribution.
Yes, as long as the chairs and participants are all sturdy and the weight of the person being lifted is evenly distributed. However, it is always important to exercise caution and have proper supervision when performing any physical demonstration.
Yes, it is possible to perform the trick with more than four people, as long as the weight is evenly distributed and each person is able to support their portion of the weight. However, it may become more difficult to coordinate and execute with a larger group.
The "4 person chair trick" demonstrates the principles of leverage, weight distribution, and teamwork. It also showcases the strength and capabilities of the human body when working together towards a common goal.