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rosalux
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Can someone please answer this question in terms of the forces acting?
Something like that. The problem lies in the wording: "raise yourself up". Raise yourself up relative to what? We have to assume you mean relative to the earth. That being the case, why should a pull you exert directly on your hair be expected to change your altitude with respect to the earth? To change your altitude with respect to the Earth you really have to exert a force against the earth, somehow. By stepping up onto a staircase that's sitting on the earth, for example.rosalux said:So that is because of the applier of the force and the object to which the force is applied are the same?
No, it isn't. One scenario has two forces (one force pair) and the other has four.rosalux said:I understand that the action and reaction forces cancel each other out but this is also true for a force that is applied by another person.
technician said:If the hair was long enough(!) to be passed over a pulley attached to the ceiling you could pull DOWN and pull yourself up !
When you pull on your own hair, any upwards force on your hair will be opposed by a downwards force at your shoulder. This involves two sets of Newton third law pairs of forces: 1 - your hand exerts an upwards force on your hair, and your hair exerts a downwards force on your hand; 2 - your arm exerts a downwards force on your shoulder, and your shoulder exerts an upwards force on your arm.rosalux said:Why someone cannot raise him/herself up by holding the hair? Can someone please answer this question in terms of the forces acting?
Damn, you're right.sophiecentaur said:Newton's First Law of Motion puts it very well.
The hair strands are not strong enough to support the weight of a person. Hair is made up of protein called keratin, which is not as strong as muscles or bones. It is not designed to bear weight or provide enough leverage for lifting.
Even with longer hair, the weight distribution is still not enough to lift the person. Hair may be longer, but it is not necessarily thicker or stronger. The same principle applies - the hair is not designed to support weight.
No, there are no exceptions. Regardless of the length or thickness of the hair, it is not capable of supporting the weight of a person. Trying to do so can result in hair breakage or even scalp injury.
No, hair extensions or wigs are not attached to the scalp and do not have the same strength as natural hair. They are not meant to bear weight and attempting to use them for lifting can cause damage to both the extensions/wigs and the person's scalp.
Yes, hair is made up of dead cells that have no nerves or muscles. This means that hair cannot actively move or exert force like muscles can. Additionally, hair is attached to the scalp by hair follicles, which are not strong enough to withstand the weight of a person. Therefore, hair cannot be used for lifting in a controlled and safe manner.