Physlet Illustration: Constant Velocity 



Two balls (one red and one blue) move at constant speeds across the floor, as
viewed from above. The distance grid is in cm, and the times are shown in
seconds. Can you determine the speed of each ball?

Hints
 Find out how far each ball moves over a specific time interval.
 Divide the distance traveled by the time it takes to move that
distance.
 Which ball (red or blue) moves faster according to your
calculations?
 Does this result agree with what you appear to see in the animation?

Reference
See Walker, Section 22

Illustration written by Steve Mellema

