Question

Что можно сказать о полной механической энергии ко леблющегося маятника в любой момент времени, если допустить, что потерь энергии нет? Согласно какому закону это можно утверждать?

Answer 1

Если потерь энергии нет то механическая энергия сохраняется, это можно утверждать на основании закона сохранения механической энергии
Е = Ек +Еп = const

Answer 2

Full Mechanical Energy of a Pendulum with No Energy Loss

If we assume that there are no energy losses, the total mechanical energy of a swinging pendulum remains constant at any point in time. This is in accordance with the law of conservation of energy, which states that the total energy of an isolated system remains constant over time.

The total mechanical energy of a pendulum at any given moment is the sum of its kinetic energy and its potential energy. The kinetic energy is due to the motion of the pendulum, while the potential energy is due to its position relative to the equilibrium point.

Law of Conservation of Energy: The law of conservation of energy, which is a fundamental principle in physics, states that the total energy of an isolated system remains constant over time. This means that energy can neither be created nor destroyed; it can only be transformed from one form to another.

In the case of a pendulum with no energy losses, this law dictates that the total mechanical energy of the pendulum (the sum of its kinetic and potential energy) remains constant throughout its motion.

Therefore, if there are no energy losses, the total mechanical energy of a swinging pendulum remains constant at any point in time, in accordance with the law of conservation of energy.

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