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Physics Calculators ▶ Kinetic Energy Calculator

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An online kinetic energy calculator helps you to calculate kinetic energy that possesses due to the motion or movement of any object. Also, this KE calculator uses a simple kinetic energy equation to calculate both the linear and rotational kinetic energy (KE) of a body.

Now, get ready to know how to calculate kinetic energy (KE) with a calculator and step-by-step, kinetic energy formula and its derivation, kinetic energy units, study about work and kinetic energy, and certain information related KE.

So, first of all, you should have to learn about the basic definition of kinetic energy physics.

According to the definition of physics, the energy that is possessed due to motion or movement of any object is kinetic energy. If the object is at rest and we apply some force on it while pushing,it will start moving. This movement will bring kinetic energy. Therefore, it can be defined as the work required to move a body of a given mass from rest to its stated velocity. Now to bring the body in the state of rest from motion, some work will be needed again. In conclusion, we can say that KE is the property of moving objects and depends on motion and mass of the particular object.

Let’s take an example. If you put an engine into a truck and a car, the speed will not be the same because of different masses of car and lorry. Calculating kinetic energy may seem challenging but you can easily find it out by using the KE calculator.

Also, you can use this online velocity calculator of physics that enables you to calculate velocity/speed of a moving object.

The formula for kinetic energy describes the association between the mass of an object and its velocity. The kinetic energy equation is:

**KE = 0.5 * m * v² or K.E. = ½ * m * v²**

where:

- m is repressing the mass of any object
- v is representing the velocity of the object.

With the help of this formula, it can be estimated how much energy will be needed to move the object of a particular mass. The same amount of energy will be required to decelerate or stop the object, but keep in mind that velocity is squared. It means that even a minor increase in speed has the capacity to bring a relatively high amount of changes in the KE. Also, you can try this kinetic energy formula calculator that uses the KE formula to calculate the kinetic energy of any moving object.

Let’s study the example of an object of “m” which is at a state of rest on a table. A force “F” will be applied to move it through a distance “S”.

- The work done=F x S
- W=F x S

Work done on the object results in a change in velocity from u to V. Additionally, one must let “a” be the acceleration.

According to the third equation of motion:

- V²-u²=2as
- s=V²-u²/2a

now apply Newton’s Second law:

- F=ma

Combine the equations:

- W=ma*(V²-u²/2a) \= (1/2) m(V²-u²)

As the object in a state of rest, u=0

- W= (1/2) mV²

Likewise, the kinetic energy of an object that is moving with a definite velocity is equivalent to work done on the object. This work is for the determination of obtaining that velocity from the condition of rest.

Therefore, the kinetic energy equation can be written as:

- KE =1/2 mV²

**Example:**

Let’s consider that:

- the mass is “m’ and m = 10 kg
- the velocity is “v” and v = 10 km/h.

Now, the kinetic energy equation: Ek = 1/2 mv2

Put the values:

- KE = 1/2 (10 kg) (10km/h)
- KE = 50 Joules
- The kinetic energy = 50 Joules.

The standard unit of kinetic energy is the joule (J), while the imperial unit of kinetic energy (kE) is the foot-pound (ft⋅lbf). If you are using a kinetic energy calculator; you can select the unit of your choice according to present conditions by clicking on the units, and the value will be instantly transformed. Some of the most common kinetic energy units are mentioned-below:

- Joule (J), equivalent to kg * m² / s² – SI unit,
- Foot-pound (ft•lb) – imperial unit,
- Electronvolt (eV),
- Calorie (cal),
- Watt-hour (Wh).

They can be converted into one another easily with the following ratios:

1 J = 0.7376 ft•lb = 6.242•10¹⁸ eV = 0.239 cal = 2.778•10⁻⁴ Wh.

An online kinetic energy calculator is helps you to estimate the energy of a body acquires through movement of any kind. You can use this KE calculator to determine the kinetic energy (KE) of a person, vehicle (truck, motorbike, truck, train, etc), plane, football, even for falling objects that crash into ground. Also, this tool can be considered for calculating the energy of different kinds of projectiles. The KE finder used standard kinetic energy formula to find KE of a rigid object. If the object is moving straight, then its linear kinetic energy can be calculated by entering the value for mass and velocity into this calculator. For the circular motion of an object, it’s rotational KE calculation needs values for moment of inertia and angular velocity. It delivers output in Joules (J, kJ, MJ), Watt-hours (Wh, kWh), calories (Cal, kCal), and foot-pounds (ft-lbs). This 100% free calculator supports both metric and imperial measurement units for kinetic energy measurements.

This KE calculator is designed to find the missing values in the equation for Kinetic Energy when two of the variables or values are known:

**KE=1/2*mv2**

Enter any two of the values i.e. mass and velocity for calculating kinetic energy. Click on the Calculate button. Furthermore, to make the concept simple have a look at the following procedure of the calculator:

Chose the option “linear” from the drop-down menu of the ke calculator. It follows the following equation:

Linear KE: = 1/2 (M * (V * V))

**Input**

- First of all, enter the value of mass
- Very next enter the value of the velocity
- Hit the calculate button

**Output**

- The very first output will be the value of KE in joules
- Mass will be delivered the same as the input with a standard unit that is kg
- Velocity will be delivered the same as the input with a standard unit that m/s
- To make another calculation just hit the recalculate button

If you have the value of KE and velocity, then mass can be calculated as follow:

M = KE / (V * V)

**Input**

- First of all, enter the value of KE
- Very next enter the value of the velocity
- Hit the calculate button

**Output**

- The very first output will be the value of KE in joules the same as the input.
- Mass will be delivered as the second output with a standard unit that is kg
- Velocity will be delivered the same as the input with a standard unit that m/s
- To make another calculation just hit the recalculate button

If you have the value of KE and mass, then velocity can be calculated by this tool as follow:

V = KE / (1/2 * M)

**Input**

- First of all, enter the value of KE.
- Very next enter the value of mass.
- Hit the calculate button

**Output**

- The very first output will be the value of KE in joules the same as the input.
- Mass will be delivered the same as the input with a standard unit that is kg
- Velocity will be delivered as the last output with a standard unit that m/s
- To make another calculation just hit the recalculate button

From drop-down menu chose “rotational”. This kinetic energy formula calculator follows the following formula of rotational KE:

KE(rotational)=1/2Iω2

**Input**

- Very first you have to Enter the value of the moment of inertia
- Now Enter the value of the angular velocity
- Hit the calculate button

**Output**

- You will get the value for rotational KE in joules as a standard unit.
- Moment of inertia will be delivered the same as the input in kg.m² as a standard unit.
- Value of angular velocity will be delivered same as the input in rad/s as a standard unit.
- To make another calculation just hit the recalculate button.

If you have the values for rotational KE and angular velocity the moment of inertia can be computed as follows:

**Input**

- Enter the rotational KE
- Enter the angular velocity
- Hit the calculate button

**Output**

- You will have a value of rotational KE same as the input in joules.
- You will have the value of the moment of inertia as a required output in kg.m².
- You will have the value of angular velocity same as the input in rad/s.
- To make another calculation just hit the recalculate button.

If vales of rotational KE and moment of inertia is known, then angular velocity can find out as follow:

**Input**

- Enter the value of rotational KE
- Enter the value of the moment of inertia
- Hit the calculate button

**Output**

- You will have a value of KE same as the input in joules.
- You will have a moment of inertia the same as the input in kg.m².
- You will have a value of angular velocity as the desired output in rad/s.
- To make another calculation hit the recalculate button

Kinetic energy is the energy of the object that is present because of the motion. Any change in the velocity of the object will bring change in kinetic energy. Subtraction of The KE of the moving object before applying force or work from the KE after applying force or work can give the value of change in KE. it can be calculated with the ease of the formula:

- Change in kinetic energy formula: W = KEf – Kei.

Where’s

- W = work done.
- KEf = kinetic energy after work done.
- Kei = kinetic energy before work done.

kinetic energy formula (KE = 0.5 x mv2) can help us to calculate the KE value by following simple steps:

- let’s suppose the mass of the object is 55 kg and velocity is 3.87m/s
- enter the values in kinetic energy equation: (KE = 0.5 x mv2) = 0.5*55*3.872 = 411.675 J.

KE = 411.675 J. - Manual calculations can be frustrating. To avoid unsatisfying calculations, the best option is to use kinetic energy calculator for calculating kinetic energy of an object.

There is some basic difference between these two types of energy as follows:

- The energy that is present because of the movement of the object is known as KE.
- It can be transferred from one object to another.
- It has a relation with the environment of the object.
- Its formula is: KE = 0.5 x mv2

- It is the form of energy that is present due to the position of the object.
- It cannot be transferred.
- It has no relation to the environment of the object.
- Its formula is : PE = mgh.

Work and kinetic energy are strictly connected. It means that an increase or decrease in the amount of work will cause a change in the KE. This relationship can be explained with the help of a work-energy theorem. It states that the work done by all outer forces is transformed into a change of kinetic energy:

**W = ΔKE = KE₂ – KE₁**

- The network “W” is the work done by the external force on an object.
- This Work done will transfers energy to the object.
- The kinetic energy of an object of mass m moving at speed v is KE=1/2mv2
- According to a work-energy theorem the network Wnet on a system changes its kinetic energy:

**Wnet= ΔKE = KE₂ – KE₁**

**Wnet = 1/2mv2₂ – 1/2mv2₁**

Kinetic energy = 1/2 * mass * velocity ^2,

- where Kinetic energy is in joules,
- mass is in kilograms,
- and velocity is in meters per second m s⁻¹.

Consider the moving object enter the values in the equation. You will have a value of KE in joules as it is a standard unit to represent the energy.

KE depends on two variables:

- the mass (m) of the object
- the speed (v) of the object.
- The following equation is accounted to represent the kinetic energy (KE) of an object: KE = 1/2MV2

If the speed of any object will triplicates the kinetic energy will be nine times more than the initial kinetic energy.

It can be assumed that speed and velocity are the same things. So, the kinetic energy of an object is related to the square of its velocity (speed). In other words, if there is a dual upsurge in speed, the kinetic energy will rise by a factor of four.

- Moving Car. Moving cars has kinetic energy because of its motion.
- A Bullet from a gun has very high kinetic energy, and, so, it can easily enter any object.
- Flying Airplane possesses a high amount of KE.
- Walking & Running activates.
- Process of Cycling
- A Cricket Ball in the playground.

The kinetic energy of an ideal gas can be calculated just by multiplying the formula for the average linear kinetic energy by the total number of molecules present in the gas sample.

PE energy depends on following three factors:

- The total mass of the object.
- height from the ground,
- strength of gravity.

The change in kinetic energy is said to equal to the change in potential energy. Both kinds of energies are negatively correlated with each other. It means that any decrease in KE will lead towards an increase in the PE, and vice-versa.

According to The equation KE=1/2mv^2; the kinetic energy is equivalent to half of the mass of the object and two times of the object’s velocity. Try this kinetic energy formula ke = 1/2 mv^{2} calculator to calculate ke according to this equation for KE,

According to the definition of Kinetic energy, it is possessed by a body because of its motion. Therefore, every moving thing in the house has KE:

- Running the fan on ceiling,
- running water from the tap,
- children running in the room

- Kinetic energy is the vitality of mass or an object that is moving.
- The KE will increase with the moving speed of the object.
- Any object that is in motion state has kinetic energy.
- Any moving object that has energy because of its motion.

This kinetic energy calculator is an efficient tool that offers its assistance to calculate the KE energy of every object in motion. Its working procedure is based on the standardized kinetic energy formula that applies to every object in a vertical or horizontal motion.

From Wikipedia, the free encyclopedia – In physics, the kinetic energy (KE) – History and etymology –Overview – Newtonian kinetic energy – Rotating bodies – units for kinetic energy – Kinetic energy of systems – Kinetic energy in quantum mechanics

From the source of Wikihow – Recently updated – Co-authored by wikiHow Staff – How to Calculate Kinetic Energy

The source of toppr – kinetic energy formula – kinetic energy equation – what is kinetic energy – Solved Examples on Kinetic Energy Formula

From the source of khanacademy – Learn what kinetic energy means and how it relates to work – how to calculate kinetic energy – work and kinetic energy (KE)