An object travels North at #1 m/s# for #3 s# and then travels South at #2 m/s# for #4 s#. What are the object's average speed and velocity?

1 Answer
Sep 19, 2017

Answer:

See below....

Explanation:

As the object goes through north,he overcame the distance #(1×3)=3m#
As the object goes through south, he overcame #(4×2)=8m#
Hence,its net displacement is #(8-3)=5m# by south.
Its average speed is (distance covered/time)=#(8+3)/(3+4)=1.57ms^-1#
and average velocity is(displacement/time) #=5/(3+4)=0.71ms^-1#