Fast-moving objects can cover large distances in a small amount of time. They are said to have a high speed. A roller coaster car moving at 60 miles per hour would be able to cover a distance of 60 miles in one hour if it could maintain this pace. The velocity of an object refers to the speed and direction in which it moves. If you drive north to your work place and your speedometer reads 35 miles per hour, then your velocity is 35 miles per hour in a northward direction.
Velocity is speed with a direction and is important in understanding bumper car collisions.
A 180-pound person is experiencing a force of gravitational attraction to the earth equal to 180 pounds. These sensations result when riders no longer feel an external force acting upon their bodies. The rider feels her normal weight. Yet, as she falls from the tower, the seat has fallen out from under her. She no longer feels the external force of the seat and subsequently has a brief sensation of weightlessness.