To calculate velocity in the Y-direction, you need to divide the change in the Y-coordinate by the change in time. This will give you the average velocity in the Y-direction.
The formula for calculating velocity in the Y-direction is vy = (y2-y1)/(t2-t1), where vy is the velocity in the Y-direction, y2 and y1 are the final and initial Y-coordinates, and t2 and t1 are the final and initial times.
The units for velocity in the Y-direction are usually meters per second (m/s) or feet per second (ft/s), depending on the unit of measurement used for the Y-coordinate and time.
The direction of velocity in the Y-direction can be determined by looking at the sign of the change in the Y-coordinate. If the Y-coordinate increases, the velocity is in the positive Y-direction, and if the Y-coordinate decreases, the velocity is in the negative Y-direction.
No, you need to know both the initial and final Y-coordinates in order to calculate velocity in the Y-direction. Without these values, it is not possible to determine the change in the Y-coordinate and therefore the velocity in the Y-direction.