Velocity - An objects speed in a particular direction. This is a vector which includes a numeric speed value AND a direction.
Displacement - A vector value of how far an object is from its starting point.
Initial Position/Final Position - The beginning location of an object and the ending location of that same object. Used to find displacement.
Delta Time (Δt) - The change in time. Found by subtracting the initial time from the final time.
Heads Up: Get used to seeing the delta (Δ) symbol and KNOW that it means "change in". You will see it a lot in physics!
Source: olson
The complexity of velocity problems can be increased if the motion is not straight line. In these cases, you will need to use vectors to solve the problems. If you are not great with vectors you may wish to visit a packet such as this one http://sophiau.com/packets/1042.
Also, be aware of the units used in physics problems! 50 km/s IS NOT the same as 50 m/s. You may have to change the units of a given number PRIOR to solving the problem.
Good luck and if you need help that Google can't supply, send me a question!
Source: olson
