An object travels North at #6 m/s# for #3 s# and then travels South at #7 m/s# for # 5 s#. What are the object's average speed and velocity?

1 Answer
Aug 12, 2017

Answer:

The average speed is #=6.625ms^-1#
The average velocity is #=2.125ms^-1#

Explanation:

The total distance travelled is #d=(6*3)+(7*5)=18+35=53m#

The total time is #t=3+5=8s#

The average speed is

#barv=d/t=53/8=6.625ms^-1#

The displacement is

#Deltax=(6*3)-(7*5)=18-35=-17m#

The average velocity is

#=(Deltax)/t=|-17|/8=2.125ms^-1#