This is the distance travelled by an object and is usually denoted by x or s. Units of distance are metres.
1.2
VELOCITY
This is the distance moved per second or the rate of change of distance with time.
Velocity is movement in a known direction so it is a vector quantity. The symbol is v or u and it may be expressed in calculus terms as the first derivative of distance with respect to time so that v = dx/dt or u = ds/dt. The units of velocity are m/s.
1.3.
SPEED
This is the same as velocity except that the direction is not known and it is not a vector and cannot be drawn as such.
1.4.
AVERAGE SPEED OR VELOCITY
When a journey is undertaken in which the body speeds up and slows down, the average velocity is defined as TOTAL DISTANCE MOVED/TIME TAKEN.
1.5.