An object travels North at $5 m/s$ for $1 s$ and then travels South at $3 m/s$ for $2 s$ . What are the object's average speed and velocity?

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Answer 1 · 2017-07-06T16:50:44

The average speed is $=3.67ms^-1$
The average velocity is $=0.33ms^-1$

The total distance travelled is $d=5*1+3*2=11m$

The total time is $t=1+2=3s$

The average speed is

$barv=d/t=11/3=3.67ms^-1$

The displacement is

$Deltax=3*2-5*1=1m$

The average velocity is

$=(Deltax)/t=1/3=0.33ms^-1$

An object travels North at 5 m/s 5 m/s for 1 s1 s and then travels South at 3 m/s 3 m/s for 2 s 2 s. What are the object's average speed and velocity?