An object travels North at #5 m/s# for #8 s# and then travels South at #8 m/s# for #5 s#. What are the object's average speed and velocity?

1 Answer
Jul 10, 2017

Answer:

The average speed is #=6.15ms^-1#
The average velocity is #=0ms^-1#

Explanation:

The total distance travelled is #d=5*8+8*5=80m#

The total time is #t=8+5=13s#

The average speed is

#barv=d/t=80/13=6.15ms^-1#

The displacement is

#Deltax=5*8-8*5=0m#

The average velocity is

#=(Deltax)/t=0/13=0ms^-1#