An object travels North at # 3 m/s# for #6 s# and then travels South at # 2 m/s# for # 4 s#. What are the object's average speed and velocity?

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Answer 1 · 2017-07-18T14:02:36

The average speed is #=2.6ms^-1#
The average velocity is #=1ms^-1#

The total distance travelled is #d=3*6+2*4=26m#

The total time is #t=6+4=10s#

The average speed is

#barv=d/t=26/10=2.6ms^-1#

The displacement is

#Deltax=3*6-2*4=10m#

The average velocity is

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