What is the definition of kinetic energy?

Beginners

Kinetic energy is the energy that an object possesses due to its motion. It is the energy an object has because of its movement and is related to the object's mass and the speed at which it is moving. The faster an object moves, the higher its kinetic energy, and the heavier an object is, the more kinetic energy it has when moving at the same speed.

Intermediate

Kinetic energy is the energy that an object possesses due to its motion. The faster an object is moving, the more kinetic energy it has. The formula for calculating kinetic energy is KE=1/2mv², where m is the mass of the object and v is its velocity (speed and direction). Intermediate students might also be aware that kinetic energy is a scalar quantity, which means it only has magnitude and no direction, and is measured in joules (J) in the International System of Units (SI).

Advanced

Kinetic energy refers to the energy an object possesses due to its motion. It is the energy that an object possesses as a result of its motion, and is generally quantified as one-half of the product of an object’s mass and the square of its velocity. In other words, it is the work that has to be done to accelerate an object of a given mass from rest to a certain velocity.