**The unit is also used less commonly as a unit of work, or energy**, in which case it is equivalent to the more common and standard SI unit of energy, the joule.

Newton-metre | |
---|---|

Unit system | SI derived unit |

Unit of | torque |

Symbol | N⋅m or N m |

Conversions |

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/s^{2}.

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: **K.E. = 1/2 m v ^{2}**. 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.

The force of kinetic friction is μ_{k} times the normal force on an object, and is expressed in units of **Newtons (N)**.

Answer: Kinetic energy is **the energy possessed by a body by the virtue of its motion**. Every moving object possesses kinetic energy.

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

Some examples of Kinetic Energy are: **A truck moving down the road has more kinetic energy than a car travelling at the same speed** because the truck's mass is much more than the car's. A river flowing at a definite speed comprises kinetic energy, as water has a certain velocity and mass.

Kinetic energy is **the energy generated by an object as a result of its motion**.

**The unit is also used less commonly as a unit of work, or energy**, in which case it is equivalent to the more common and standard SI unit of energy, the joule.

Newton-metre | |
---|---|

Unit system | SI derived unit |

Unit of | torque |

Symbol | N⋅m or N m |

Conversions |

The correct answer is **Joule**. Joule is the standard unit of kinetic energy. Other units for energy include the newton-meter (Nm) and the kilogram meter squared over seconds squared (kg m^{2}/s^{2}).

The commercial unit of energy is **1 kWh**. One kilowatt-hour is defined as the amount of energy consumed by a device in one working hour at a constant rate of one kilowatt. The SI unit of energy is Joule.

watt, **unit of power in the International System of Units (SI)** equal to one joule of work performed per second, or to ^{1}/_{746} horsepower.

joule, **unit of work or energy in the International System of Units (SI**); it is equal to the work done by a force of one newton acting through one metre.

( K)

Joule

**The kilowatt-hour (symbolized kWh) is a unit of energy** equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time. 1 kWh = One thousand watt hours.

Kinetic energy is **a form of energy that an object or a particle has by reason of its motion**. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

Kinetic energy is **the energy an object has because of its motion**. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.

Kinetic energy is **the energy associated with the movement of objects**. The kinetic energy of an object depends on both its mass and velocity, with its velocity playing a much greater role. Let a body of mass M moving with velocity V. K. E=21MV2, its SI unit is Jule.

Dated : 06-Jul-2022

Category : Education