/
xddxdd
/
Python
Обзор
Документация
Войти
/
xddxdd
/
Python
Код
Запросы
0
Задачи
Вики
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
physics/kinetic_energy.py
50 строк
2 KB
SparshRastogi
Update kinetic_energy.py (#7848)
30 окт 2022, 00:24
Не верифицирован
30 окт 2022, 00:24
3ec0aa8
Код
Авторство
О чём код?
""" Find the kinetic energy of an object, given its mass and velocity. Description : In physics, the kinetic energy of an object is the energy that it possesses due to its motion.It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.The same amount of work is done by the body when decelerating from its current speed to a state of rest.Formally, a kinetic energy is any term in a system's Lagrangian which includes a derivative with respect to time. In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is ½mv².In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.The standard unit of kinetic energy is the joule, while the English unit of kinetic energy is the foot-pound. Reference : https://en.m.wikipedia.org/wiki/Kinetic_energy """ def kinetic_energy(mass: float, velocity: float) -> float: """ Calculate kinetic energy. The kinetic energy of a non-rotating object of mass m traveling at a speed v is ½mv² >>> kinetic_energy(10,10) 500.0 >>> kinetic_energy(0,10) 0.0 >>> kinetic_energy(10,0) 0.0 >>> kinetic_energy(20,-20) 4000.0 >>> kinetic_energy(0,0) 0.0 >>> kinetic_energy(2,2) 4.0 >>> kinetic_energy(100,100) 500000.0 """ if mass < 0: raise ValueError("The mass of a body cannot be negative") return 0.5 * mass * abs(velocity) * abs(velocity) if __name__ == "__main__": import doctest doctest.testmod(verbose=True)