Average Velocity, or the ratio of position displacement to time, is one such quantity. However, average speed involves the total distance covered by an object, not just its displacement. Instantaneous velocity refers to the velocity of an object at a specific point in time. The instantaneous velocity is the derivative of the object's position. Again, whereas velocity is vector and has direction, speed is scalar and does not.
Acceleration is the slope of the velocity curve at a certain point.
This is also the magnitude if the acceleration of a free falling object near the earth s surface. Graph v vs. t and indicate how to find average acceleration on the graph. Given the position curve, sketch velocity and acceleration. If the signs of velocity and acceleration of a particle are the same, the speed increases. If the signs are different the speed decreases.