An object travels North at 5 m/s for 2 s and then travels South at 3 m/s for 2 s. What are the object's average speed and velocity?

1 Answer
Oct 4, 2017

Object Travel North at 5 m/s for 2 second
Distance Travel in North Direction d_N="Velocity"xx""time"
d_N=5xx2=10m

Object Travel South at 3 m/s for 2 second
Distance Travel in North Direction d_S="Velocity"xx""time"
d_N=3xx2=6m

Displacement from initial Position to Final position s="Distance Travel in North"-"Distance Travel in South"
(We are taking North side as Positive)
s=d_N-d_S=10-6=4 m

Average Speed ="Total Distance Travel"/"Total Time"
v_"avg"=(10+6)/(2+2)=16/4=4 m/s

Average Velocity ="Total Displcement"/"Total Time"
vecv_"avg"=(4)/(2+2)=4/4=1 m/s

Direction of average Velocity is in North