Final answer:
Relativistic momentum is different from the Newtonian velocity calculation for objects moving at high speeds close to the speed of light. It takes into account the effects of special relativity, such as time dilation and length contraction. At high speeds, relativistic momentum approaches infinity, indicating that an object with mass cannot reach the speed of light.
Step-by-step explanation:
In physics, the momentum of an object at high speeds, close to the speed of light (c), is described by relativistic momentum. This is different from the Newtonian velocity calculation, which applies to objects moving at low velocities. Relativistic momentum takes into account the effects of special relativity, such as time dilation and length contraction.
At high speeds, relativistic momentum increases significantly, approaching infinity as the velocity (u) approaches the speed of light (c). This implies that an object with mass cannot reach the speed of light, as its momentum would become infinite, which is unreasonable.
It's important to note that at low velocities, relativistic momentum is equivalent to classical momentum. This means that the two calculations converge and provide similar results when the object is moving at low speeds.