In order to hold the open door in the metro lobby (the door opens in both directions and returns to the balance position with springs)
| November 14, 2020 | Education
In order to hold the open door in the metro lobby (the door opens in both directions and returns to the balance position with springs), you need to apply a force of about 50? To the door handle. Can the door be opened by applying a force of 0.005N to the handle? (Ignore friction in the door hinges).
It is possible if you periodically press with a force of 0.005 N with a frequency equal to the frequency of oscillations of the door on the springs.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.