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Anonymous users2024-01-24Is the question of what moment is the rate?
If it is asked to fall to the same ground, three are the same.
The reason is simple. Conservation of energy.
Falling to the ground from the same height, the gravitational potential energy is converted into kinetic energy.
Since the resistance of the air is not taken into account, the mechanical energy of the three balls is conserved, because their initial velocity is the same, and they are thrown from the same position, and finally they all fall on the ground, so their initial and final positions are the same, and the initial kinetic energy is also the same, and it can be seen from the conservation of mechanical energy, and the final kinetic energy is also the same, so the magnitude of the final velocity is the same >>>More
D test question analysis: The starting point of the three balls is the same, the falling height is the same, so the gravitational work is the same, and the initial kinetic energy is the same, so it is <> according to the kinetic energy theorem >>>More
Just as big.
mgh+ >>>More
The mechanical energy of the object is conserved under the action of a conservative force: gravity is a conservative force, and the work done by him is not related to the path, but only to the change in altitude (position). >>>More
Yes, I have a crush on him, and I went out to the balcony to fight the landlord when it was so cold, but it could also be to breathe new air.