Velocity

• Velocity is the rate of change over time.
• It's how fast you're going.
• This is typically measured in metres per second or m/s.
• I also like miles per hour.
• v=delta(x)/delta(t); that is the change in location/ change in time.
• This is calculus, as is acceleration. (The first derivative of location is velocity, the second acceleration. I also took 3 semesters of calculus at University.)
• However, the simple version where velocity is constant is easy enough.
• If you are going up at 2 m/s, and you've gone for 5 seconds, and you start at (4,5,1), you move 10 m in 5 seconds, up is the third vector elemet so you are at (4,5,11).
• Note that the direction that you are travelling in can be represented by a unit vector.