A body on the surface of the Earth was told in a vertical direction a speed exactly equal to the first cosmic speed. What will happen to this body? Neglect the resistance of the Earth’s atmosphere.
Even if the earth’s atmosphere did not slow down the movement of this body, it would still soon fall to the earth, since a second cosmic velocity is needed to escape the earth’s gravity. Our body would enter an elliptical orbit, the perigee point of which would be inside the Earth, which means the subsequent inevitable fall to the surface of our planet. It will occur just 1 hour 10 minutes after launch (this value coincides with the period of the orbiting the Earth near its surface along a circular path). The body will fall to the same point only if it was launched from the Earth’s pole, in all other cases the fall point will be displaced from it in the direction of the equator and to the west.
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.