# An object travels North at # 4# # ms^-1# for #3# #s# and then travels South at # 6 # #ms^-1# for # 8# # s#. What are the object's average speed and velocity?

##### 1 Answer

Apr 28, 2016

The average speed is the total distance over the time, the average velocity is the total displacement over time. Speed =

#### Explanation:

Find the distances traveled in each step:

The total distance is the simple sum of these two distances,

The total displacement is the difference between them,

The total time is

To find the average speed:

To find the average velocity: