mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-23 21:11:08 +00:00
cbdbe07ffd
* Create kinetic_energy.py Finding the kinetic energy of an object,by taking its mass and velocity as input * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update kinetic_energy.py * Update kinetic_energy.py Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Christian Clauss <cclauss@me.com>
48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
"""
|
|
Find the kinetic energy of an object, give 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:
|
|
"""
|
|
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)
|