An object that has kinetic energy must have both mass and velocity. Kinetic energy is the energy of motion possessed by an object. The formula for calculating kinetic energy is:
Kinetic Energy = 0.5 * mass * velocity^2
Here, "mass" refers to the mass of the object, which is a measure of its inertia or the amount of matter it contains. "Velocity" refers to the speed of the object in a particular direction. The square of the velocity is used in the formula, indicating that kinetic energy is directly proportional to the square of the object's velocity.
In summary, for an object to possess kinetic energy, it must have both mass (inertia) and be in motion with a non-zero velocity.