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Anzeige Calculate Kinetic EnergyCalculating kinetic energy or energy of motion from mass and speed. Kinetic energy is energy of motion, it corresponds to the work needed to move the object from a state of rest into the corresponding motion. Likewise, this energy is released and converted into other forms of energy or into kinetic energy of other objects when an object loses speed.The formula for the calculation is: kinetic energy = mass * velocity² / 2 E = m * v² / 2 Please enter two values, the third value will be calculated. The selectable units for energy are J for joules and Wh for watt hours, both also with a kilo- in front. Mass can be specified in grams, kilograms and tons, speed in meters per second, kilometers per hour and miles per hour. A joule is a kilogram times a square meter divided by a square second. Since a watt is equal to a kilogram times a square meter divided by a cubic second, a joule is equal to a watt second. A watt hour then has 3600 joules, since an hour has the same number of seconds. Examples: a body with a mass of five kilograms that has a speed of 20 kilometers per hour experiences a kinetic energy of just over 77 joules. A two-ton car that travels at a speed of 100 kilometers per hour has a kinetic energy of 7.72 kilojoules or 2.14 watt hours. Kinetic energy is calculated as mass multiplied by speed, divided by 2. This factor 1/2 results from the fact that kinetic energy is the integral of force over time. The formula for force is F=m*a, acceleration a integrated over time gives half the squared speed, 1/2 v². |