What is the origin of the word kinetic energy?
The adjective kinetic has its roots in the Greek word kinesis, meaning motion. This linguistic origin traces back to Aristotle's concepts of actuality and potentiality.
Questions about Kinetic energy
Short answers, pulled from the story.
Who developed the principle that energy is proportional to mass times velocity squared?
Gottfried Leibniz and Johann Bernoulli developed the principle that energy is proportional to mass times velocity squared. Willem 's Gravesande of the Netherlands provided experimental evidence of this relationship in 1722.
How do you calculate the kinetic energy of an 80 kg mass traveling at 18 metres per second?
One would calculate the kinetic energy of an 80 kg mass traveling at 18 metres per second as 13 kilojoules. The formula for non-rotating objects equals one half mv squared with mass measured in kilograms and speed in metres per second.
When does relativistic mechanics become necessary for calculating kinetic energy?
If a body's speed relative to an inertial frame is a significant fraction of the speed of light it is necessary to use relativistic mechanics. In relativistic mechanics energy combines with momentum in a way analogous to the combination of time and space into spacetime.
What happens to the kinetic energy of a car when its speed doubles?
Since the kinetic energy increases with the square of the speed an object doubling its speed has four times as much kinetic energy. A car traveling twice as fast as another requires four times as much distance to stop assuming a constant braking force.