Speed, Velocity and Acceleration Relationships

Speed, velocity and acceleration are all connected. Speed is how fast. Velocity is speed in it's direction. And acceleration is the changes in speed, and the speed of those changes. Terminal velocity is when the velocity stops going in a direction, and heads back to the starting point, and stops, hence the term "terminal". Gravity is a force which makes all objects of mass, to have a certain height above the center of gravity, or grounds of planets. In a car race, speed is how fast the car was going (e.g 150 km/h, velocity 150km/h forward, and acceleration 1-150 km/h in 5 seconds.)