According to the theory of relativity, specifically the special theory of relativity, an object with zero mass, such as a photon (light particle), can indeed have a non-zero velocity. In fact, massless particles, like photons, always travel at the speed of light in a vacuum, denoted by the symbol 'c' in physics.
The special theory of relativity states that the speed of light in a vacuum is a fundamental constant of nature and is the same for all observers, regardless of their relative velocities. This means that massless particles, including photons, are always moving at the speed of light, regardless of their energy or frequency.
On the other hand, massive particles, such as cars or everyday objects, cannot reach or exceed the speed of light in a vacuum. As an object with mass approaches the speed of light, its energy and momentum increase, requiring an infinite amount of energy to reach or exceed the speed of light. This is why massive objects, like cars, cannot attain a non-zero velocity equal to the speed of light.