Physics Homework 1. A swimmer is in Lake Lanier practicing a 100 m individual medley event. They swim East 25
m using butterfly, West 25 m using backstroke, East 25 m using breaststroke, and finally West
25 m using freestyle. This event takes them 70 seconds to complete.
T
a. What was the swimmer's average speed?
b. What was the swimmer's average velocity?

Explanation:

a. Average speed = distance / time

= 100 m / 70 s

= 1.43 m/s

b. Average displacement = displacement / time

= 0 m / 70 s

= 0 m/s

Distance is the length of the path traveled.  Displacement is the difference between the final position and initial position.

what type of charge does it have? negative

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )