<human>:  I am having trouble understanding the concept of velocity. Can you explain it?
<bot>: Velocity is the rate at which an object moves in a certain direction. It is measured in units of distance per unit of time, for example meters per second (m/s). Velocity is different from speed, which is simply the rate at which an object is traveling, regardless of the direction. In other words, the velocity of an object takes into account both its speed and the direction it is traveling in.