Question

what is meant by kinetic energy ​

Answer 1

Required Answer :

• In physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion.

• It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

• Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

• The same amount of work is done by the body when decelerating from its current speed to a state of rest.

• In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is $\dfrac{1}{2}$ mv².

• In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

• The standard unit of kinetic energy is the joule, while the imperial unit of kinetic energy is the foot-pound.