Is it impossible to stand without leaning in a straight backed chair?

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Standing up from a straight-backed chair without leaning is impossible due to the position of the center of mass, which is behind the feet. This makes it difficult to maintain balance without leaning forward. If friction were sufficiently high to prevent sliding, one could theoretically generate torque by pushing against the floor and the chair simultaneously. However, in typical conditions, this balance cannot be achieved. The discussion highlights the physics of body mechanics in relation to chair design and standing posture.
Himal kharel
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sit in a straight backed chair and try to stand without leaning. you are not able to do it .
why is it impossibe?
 
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Because your center of mass is well behind the point of conact between your feet and the floor. If the friction was high enough that neither the chair or your feet would slide, then the person could stand up by pushing forward with this feet against the floor and backwards with his legs against the chair to generate a torque.
 

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