No, velocity does not depend on mass or size in the case of all moving bodies. The velocity of an object is determined solely by its speed and direction of motion, not by its mass or size.
Velocity is a vector quantity that represents both the magnitude (speed) and direction of motion. It describes how fast an object is moving and in what direction. The mass and size of an object do not affect its velocity.
According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This relationship, expressed as F = ma, shows that mass affects acceleration, not velocity.
In simpler terms, two objects with different masses and sizes but the same velocity will be moving at the same speed and in the same direction. Their velocity is determined solely by their speed and direction, independent of their mass or size.
It's important to note that mass and size can affect other properties and behaviors of moving bodies, such as momentum, kinetic energy, and interactions with other objects, but they do not directly determine the velocity of an object.