In physics, a joule is the unit of work or energy. It is also the unit of heat and thermodynamic work. Its symbol is J. The joule is named after the English physicist James Prescott Joule (1818-1889).

**One joule is the amount of work done when an object is moved one meter against a force of one newton**. A force of one newton is the force that is needed to accelerate an object with a mass of one kilogram at a rate of one meter per second squared.

## What is the unit of potential energy?

The **unit of potential energy** is joules.

Potential energy is the energy that an object has due to its position. For example, a ball that is held above the ground has potential energy because it could fall and convert that energy into kinetic energy (the energy of motion).

The amount of potential energy that an object has depends on two factors: its mass (m) and its height (h). Potential energy is equal to the object’s mass multiplied by gravity (g) multiplied by the object’s height:

**PE = m * g * h**

Because the unit ofmass is kg and the unit of gravity is m/s^{2}, the unit of potential energy is kg * m/s^{2} * m, or joules (J).

Objects with more mass or that are higher off the ground have more potential energy.

## Is joules a unit of potential energy?

**Yes, joules is the unit of potential energy.** Potential energy is the stored energy in an object. It is the energy that an object has because of its position. An object has the potential to do work because of the force acting on it. If no force is acting on it, then it has no potential to do work.

**The SI unit of energy is the joule (J)**, which is defined as the work done by a force of one newton (N) when its point of application moves one meter (m) in the direction of the force. Potential energy is usually measured in joules, but it can also be expressed in other units such as electron volts (eV) and calories (cal).

Potential energy can be either **kinetic** or **chemical.** Kinetic energy is the energy of motion. Chemical potential energy is the energy stored in the bonds between atoms. Nuclear potential energy is the energy stored in the nucleus of an atom.

The SI unit of power is the watt (W), which is defined as one joule per second (J/s). Potential energy can be converted to work or heat, but it cannot be converted to power.

## What is the SI base unit of potential energy?

The SI base unit of potential energy is the joule. Potential energy is the energy stored in an object due to its position or condition. It is the energy that would be released if the object were to fall. Potential energy can be converted into kinetic energy, which is the energy of motion.

**There are many different types of potential energy, including:**

**Gravitational potential energy:**This is the energy stored in an object due to its position in relation to gravity. For example, a rock at the top of a cliff has more gravitational potential energy than a rock at the bottom of the cliff.**Chemical potential energy:**This is the energy stored in the bonds between atoms. When these bonds are broken, chemical potential energy is converted into heat, light, or sound.**Elastic potential energy:**This is theenergy stored in an object that can be stretched or compressed. For example, a rubber band has elastic potential energy when it is stretched.**Nuclear potential energy:**This is theenergy stored in the nucleus of an atom. It is converted into heat and light when nuclear fission or fusion occurs.

Potential energy is measured in joules (J). One joule is equal to the amount of energy needed to move an object one meter against a force of one newton. A newton is the unit of force in the SI system.

## What is SI unit of potential energy and kinetic energy?

The **unit of energy** is joule (J) while the CGS unit of energy is erg. The kinetic energy and potential energy are just forms of energy and share the same units as energy. Therefore, the S.I. unit of potential is joule (J).

One joule is equal to the kinetic energy of a one kilogram mass moving at a speed of one meter per second squared. An object with a mass of one kilogram has a weight of about nine and a half newtons on Earth. Therefore, one joule is also the amount of work that must be done to move an object with a weight of one newton over a distance of one meter.

Potential energy is usually measured in joules, but in some cases it can be measured in electron volts. **One electron volt is the amount of energy an electron gains when it is moved through an electric potential difference of one volt.**

Kinetic energy is the energy that an object has due to its motion. The kinetic energy of an object depends on its mass and velocity. The SI unit of kinetic energy is the joule.

In physics, there are two types of energy: **potential energy** and **kinetic energy**. Potential energy is stored energy, while kinetic energy is energy that is being used.

**Potential Energy**

**Gravitational potential energy**– The gravitational potential energy is the amount of work that must be done to move an object from one point to another in a gravitational field.**Elastic potential energy**– Elastic potential energy is the amount of work that must be done to stretch or compress an elastic object.**Chemical potential energy**– Chemical potential energy is the amount of work that must be done to break or make chemical bonds.

## What is the unit of kinetic energy?

**The units of kinetic energy are mass times the square of speed, or kg · m ^{2} /s ^{2}.** But the units of force are mass times acceleration, kg · m/s

^{2}, so the units of kinetic energy are also the units of force times distance, which are the units of work, or joules.

This means that when an object is in motion, it has kinetic energy. The amount of kinetic energy that an object has depends on its mass and speed. The faster an object is moving, the more kinetic energy it has.

There are two types of kinetic energy: **potential** and **kinetic.**

**Potential energy**is stored energy, such as when an object is at rest on a hill.**Kinetic energy**is the energy of motion, such as when an object is rolling down the hill. The unit of measurement for both types of kinetic energy is the same.

The SI unit of kinetic energy is the joule (J), which is equal to one kilogram meter squared per second squared (kg · m^{2}/s^{2}).

## What is the S.I unit of potential difference?

**In the International System of Units (SI), potential difference is expressed in units of joules per coulomb or Volts.**

**Potential difference** is a measure of the work done to move a unit charge from one point to another. In other words, it is the amount of energy required to move a unit charge from one point to another.

**The SI unit of potential difference is the volt**. Potential difference is also sometimes called voltage.

Potential difference can be caused by a variety of things, including **electric fields, magnetic fields,** and **gravity.**

Potential difference can be measured with a variety of devices, including voltmeters, ammeters, and multimeters.