Question

Расскажите мне про энергию. Кинетическую и потенциальную. Ваще не шарю:/

Answer 1

Потенциальная энергия - это энергия, которой обладает тело, поднятое на какую-то высоту над землей. 
А кинетической энергией тело обладает при наличии какой-либо скорости, т. е. при движении! 
Мячик подняли над землей - у него появилась потенциальная энергия (mgh), когда его отпустили потенциальная энергия _постепенно_ переходит в кинетическую (mv^2/2). Когда он коснется земли вся потенциальная энергия перейдет в кинетическую. Когда мячик оттолкнувшись от земли полетит вверх, то кинетическая энергия будет переходить в потенциальную.

Answer 2

Energy: Kinetic and Potential

Energy is a fundamental concept in physics that describes the ability of a system to do work or cause a change. There are various forms of energy, including kinetic energy and potential energy.

Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass of the object and its velocity. The formula for calculating kinetic energy is:

Kinetic Energy = (1/2) * mass * velocity^2

For example, when a car is moving, it possesses kinetic energy due to its motion. The faster the car is moving or the heavier it is, the greater its kinetic energy.

Potential energy is the energy possessed by an object due to its position or state. It can be stored energy that can be converted into other forms of energy. There are different types of potential energy, such as gravitational potential energy, elastic potential energy, and chemical potential energy.

- Gravitational potential energy is the energy possessed by an object due to its height above the ground. The formula for calculating gravitational potential energy is:

Gravitational Potential Energy = mass * gravitational acceleration * height

For example, when a book is lifted to a higher shelf, it gains gravitational potential energy due to its increased height.

- Elastic potential energy is the energy stored in an object when it is stretched or compressed. The formula for calculating elastic potential energy depends on the spring constant and the displacement of the object from its equilibrium position.

- Chemical potential energy is the energy stored in chemical bonds. When chemical reactions occur, the potential energy stored in the bonds is released or absorbed.

It's important to note that energy can be converted from one form to another. For example, when a ball is thrown into the air, it initially possesses kinetic energy due to its motion. As it reaches its highest point, its kinetic energy decreases, and its potential energy increases. When it falls back down, its potential energy decreases, and its kinetic energy increases.

I hope this explanation helps! Let me know if you have any further questions.