An object travels North at #6 m/s# for #2 s# and then travels South at #2 m/s# for #8 s#. What are the object's average speed and velocity?

1 Answer
Aug 8, 2017

Answer:

The average speed is #=2.8ms^-1#
The average velocity is #=0.4ms^-1#

Explanation:

The total distance travelled is #d=(6*2)+(2*8)=12+16=28m#

The total time is #t=2+8=10s#

The average speed is

#barv=d/t=28/10=2.8ms^-1#

The displacement is

#Deltax=(6*2)-(2*8)=12-16=-4m#

The average velocity is

#=(Deltax)/t=4/10=0.4ms^-1#