Question

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what means kinetic energy​

Answer 1

Answer :-

Kinetic energy is a form of energy that an object or a particle has by reason of its motion. ... Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.

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Answer 2

What is kinetic energy?

Kinetic energy is the free movement input to a mass to make the corresponding momentum change or the momentum change that release the corresponding amount of free movement of mass. In general, we can just say Kinetic energy is the free movement of mass.

Heat is caused by the vibration movement of microscopic particles such as quantum particles, plasma particles, and atoms... So it is also a kind of kinetic energy. All free movements of mass are kinetic energy. The so called thermal energy is a specific form of kinetic energy that is measured, used in its specific way.

For mass state matter (here are solid objects):

Quantitatively it is the product of the momentum change ∆p and the average rate (measured in v) of this change (v - u) /2: the general illustrative expression of it: E = ∆p*v/2.