Calculator UseThis calculator will find the missing variable in the physics equation for Kinetic Energy of a rigid body, when two of the variables are known. Show
$$ KE = \dfrac{1}{2}mv^2 $$ Where:
Kinetic EnergyKinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2. We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless. References/ Further Reading
Created by Mateusz Mucha and Wojciech Sas, PhD candidate Reviewed by Bogna Szyk and Jack Bowater Last updated: Apr 26, 2022 This kinetic energy calculator is a tool which helps you assess the energy of motion. It is based on the kinetic energy formula, which applies to every object in vertical or horizontal motion. The following article will explain:
Kinetic energy definitionThe encyclopedia provides the following definition of kinetic energy: 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 its kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. What is kinetic energy?Kinetic energy is the energy of an object in motion. It provides information about how the mass of an object influences its velocity. Let's take an example. If you put the same engine into a lorry and a slick car, the former is not able to achieve the same speed as the latter because of its mass. Another example of kinetic energy is the human punch force, where the energy accumulates in the body and transfers through the punch. You can easily find it out by using our kinetic energy calculator. Kinetic energy formulaThe kinetic energy formula defines the relationship between the mass of an object and its velocity. The kinetic energy equation is as follows:
where:
With the kinetic energy formula, you can estimate how much energy is needed to move an object. The same energy could be used to decelerate the object, but keep in mind that velocity is squared. This means that even a small increase in speed changes the kinetic energy by a relatively high amount. How about you give our kinetic energy calculator a try? This tool do any and every calculation for you after typing the mass and velocity of an object. It even works in reverse, just input any two known variables and you will receive the third! If you don't know the speed of the object, you can easily calculate it with our velocity calculator. You should be aware, however, that this formula doesn't take into account relativistic effects, which become noticeable at higher speeds. If an object is moving faster than 1% of the speed of light (approximately 3,000 km/s, or 3,000,000 m/s), you should use our relativistic kinetic energy calculator. Kinetic energy unitsThe units of kinetic energy are precisely the same as for any other type of energy. The most popular and commonly used kinetic energy units are:
All of these kinetic energy units can be easily converted into one
another with the following ratios: 🔎 If you have problems with doing ratios, check out our detailed article on how to find a ratio or its missing terms! As you can see, depending on the scale, they may differ by a significant number of orders of magnitude, so it's convenient to use scientific notation or express them with some prefix like kilo- (kcal, kWh), Mega- (MeV), etc. Anyway, you don't need to worry about the units while using our kinetic energy calculator; you can choose whichever you like by clicking on the units, and the value will be immediately converted. Potential and kinetic energyPotential energy refers to the gravitational pull exerted on an object, relative to how far it has to fall. When the object gains altitude, its potential energy increases. If you want to check what potential energy is and how to calculate it, use our potential energy calculator. The work-energy theoremIt turns out that kinetic energy and the amount of work done in the system are strictly correlated, and their relation can be described by the work-energy theorem. It states that the work done by all external forces is converted into a change of kinetic energy:
Actually, there are several types of kinetic energies. We can distinguish:
At the microscopic scale, all of these kinetic energy examples are manifestations of thermal energy, which increases as the temperature rises. The relation between dynamic pressure and kinetic energyThe expression of the dynamic pressure (caused by fluid flowing) is the following:
It looks very similar to the kinetic energy equation because mass is replaced by the density, and it isn't a coincidence. The other name for dynamic pressure is kinetic energy per unit volume, and analogically, density is defined as the mass contained in a particular volume. With just a pinch of imagination, you can use our kinetic energy calculator to estimate the dynamic pressure of a given fluid. If you replace mass in kg with density in kg/m³, then you can think about the result in J as the dynamic pressure in Pa. Kinetic energy examplesYou're sitting in class and your teacher tells you that the kinetic energy of an object equals 1 J. What do you think - is that a lot, or not really? The key information is what kind of object we are talking about. Let's take a look at some computational kinetic energy examples to get to grips with the various orders of magnitude:
FAQWhat is kinetic energy?Kinetic energy can be defined as the energy possessed by an object or a body while in motion. Kinetic energy depends on two properties: mass and the velocity of the object. What is the formula for calculating kinetic energy?The formula to calculate the kinetic energy of an object
with mass m and traveling at velocity v is How to calculate kinetic energy?To calculate kinetic energy:
How much is the kinetic energy of a cricket ball travelling at 90 miles an hour?An average cricket ball weighs What is the kinetic energy of football during a field goal kick?A Mateusz Mucha and Wojciech Sas, PhD candidate AccelerationBank angleBelt length… 79 more How do you calculate the kinetic energy of a moving car?the kinetic energy of a moving car object is KE=1/2mv^2. create and test a function called KE to find the kinetic energy of a moving car if you know the mass m and the velocity v of the vehicle.
What is the formula for kinetic energy?Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
What is the kinetic energy of a car that has a mass of 1000 kg and is moving at a speed of 30 m s?Units: Joules (J) Page 16 Example #2: What is the Kinetic Energy of a 1,000 kg car moving at 30 m/s? KE = 450,000 J Page 17 Example #3: What is the Kinetic Energy of a 20,000 kg freight car moving at 25 m/s?
What is the kinetic energy of a vehicle with mass?In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.
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