The Homework Masters   8-5

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Homework Tips

SCIENCE

Speed

The distance traveled divided by the time interval during by the time interval during which the motion occurred.


How fast an object moves.


         d

   v =  ---

         t


example (from the textbook)-


Suppose a wheelchair racer finishes a 132m race in 18 s.


    132m

v = ------- 

   18 s

= 7.3 meters per second



Velocity

The speed of an object in a particular direction.


         d

   v =  ---

         t

(and include direction)


example (from the textbook)-


Find the velocity in m/s of a swimmer who swims 110m toward the shore in 72s.


    110m

v = -------

    72s

= 1.528 meters per second towards the shore