The y-intercept of a velocity-time graph represents the initial velocity of an object, or the velocity at which the object starts moving.
The y-intercept is important because it provides information about the motion of an object at the beginning of its movement. It can also help determine the acceleration of the object.
The y-intercept can be calculated by finding the value of velocity on the y-axis when time is equal to 0. This can be done by looking at the coordinates of the point where the graph intersects the y-axis.
Yes, the y-intercept of a velocity-time graph can be negative. This indicates that the initial velocity of the object is in the opposite direction of the positive direction on the graph.
The y-intercept can be affected by changes in the initial velocity of the object, changes in the starting point of the object, or changes in the direction of the object's motion.