Congress has often used the Commerce Clause to justify exercising legislative power over the activities of states and their citizens, leading to significant and ongoing controversy regarding the balance of power between the federal government and the states.
Instantaneous and Average Velocity. instantaneous velocity of an object at a particular time is equal to the slope of its position vs. time graph at that time. On the other hand, the average velocity between two times is equal to the slope of the line joining the two points on the position vs. time graph.
Instantaneous velocity is like taking a sample of an object's movement randomly. If there is a car moving at 60 miles per hour for 10 miles and there is a sample of the velocity at the 3 mile point, it will show the 60 mph speed. The measurement taken in that instant is the instantaneous velocity.