Velocity is the term used for speed when the object travels in a uniform direction ie. Use the formula speed distancetime to calculate the speed. Calculating speed and mass using conservation of momentum.
In a physics equation given a constant acceleration and the change in velocity of an object you can figure out both the time involved and the distance traveled.
Speed is measured as distance moved over time. The triangles will help you remember these three rules. Velocity is the term used for speed when the object travels in a uniform direction ie. Find the distance that an object has traveled.