An object travels North at $8 m/s$ for $4 s$ and then travels South at $5 m/s$ for $3 s$ . What are the object's average speed and velocity?

Question

1277 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-07-18T06:01:36

The average speed is $=6.71ms^-1$
The average velocity is $=2.43ms^-1$

The total distance travelled is $d=8*4+5*3=47m$

The total time is $t=4+3=7s$

The average speed is

$barv=d/t=47/7=6.71ms^-1$

The displacement is

$Deltax=8*4-5*3=17m$

The average velocity is

$=(Deltax)/t=17/7=2.43ms^-1$

An object travels North at 8 m/s8 m/s for 4 s4 s and then travels South at 5 m/s5 m/s for 3 s3 s. What are the object's average speed and velocity?