Question

The energy of an object that is due to the object's motion is called kinetic energy. (State whether the given statement is True or False.)
A. True
B. False

Answer 1

Energy is the quantitative quality that must be supplied to a body or physical system in order to perform work on it or to heat it, according to physics. Energy is a conserved quantity, meaning it may be transformed in form but not generated or destroyed, according to the rule of conservation of energy.

Complete answer:
The kinetic energy of an item is the energy it has owing to its motion in physics. It is the amount of effort required to propel a body of a given mass from rest to a certain velocity.The body retains its kinetic energy after gaining it during acceleration unless its speed changes.

When the body decelerates from its current speed to a condition of rest, it does the same amount of effort. The kinetic energy of a non-rotating object of mass m moving at a speed v is in classical mechanics.
${E_k} = \dfrac{1}{2}m{v^2}$
Only when $v$ is substantially less than the speed of light is this a fair approximation in relativistic mechanics. The joule is the standard unit of kinetic energy.

Examples of how kinetic energy is converted into and out of different types of energy may help you better understand it. A biker, for example, uses chemical energy from meals to accelerate a bicycle to a desired pace. Except to overcome air resistance and friction, this speed can be maintained on a flat surface with no further effort. The chemical energy has been transformed to kinetic energy, or the energy of motion, but the process is inefficient and the rider generates heat as a result.

Hence option A is correct.

Note: The kinetic energy of such systems is determined by the reference frame chosen: the centre of momentum frame, that is, the reference frame in which the total momentum of the system is zero, offers the lowest value of that energy. This lowest kinetic energy adds to the system's overall invariant mass.