What is joules what is its equation?
Answers
, the joule is the unit of energy or work. It is a compound unit defined as 1 newton of force over a distance of 1 meter, or as the kinetic energy of a 1 kilogram mass moving at one meter per second. Joules can also be converted from calories, as calories are another unit of energy. There are 4.19 joules in every calorie. You can calculate joules by calculating the kinetic energy, or energy of motion, of an object. You can also calculate the joules by calculating the amount of work accomplished by a person or machine. Lastly, you can calculate joules by converting directly from a measurement in calories.
Calculating Joules of Kinetic Energy
Write the equation for kinetic energy:
Kinetic energy = 1/2 * mass * velocity ^2, where Kinetic energy is in joules, mass is in kilograms, and velocity is in meters per second.
Consider the moving object for which you would like to calculate the kinetic energy in joules. For example, suppose you want to calculate the energy of a 700 kilogram (kg) car moving at 20 meters per second (m/s).
Plug the values into the kinetic energy equation to calculate the joules, as shown below:
Kinetic Energy = 1/2 * 700 kg * 20^2 m/s = 140,000 joules
Answer:
In equation form: work (joules) = force (newtons) x distance (meters), where a joule is the unit of work, as defined in the following paragraph. In practical terms, even a small force can do a lot of work if it is exerted over a long distance.
Explanation:
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