An object travels North at $6 m/s$ for $2 s$ and then travels South at $1 m/s$ for $7 s$ . What are the object's average speed and velocity?

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Answer 1 · 2017-06-22T06:33:44

The average speed is $=2.11ms^-1$
The average velocity is $=0.56ms^-1$

The total distance travelled is $d=6*2+1*7=19m$

The total time is $t=2+7=9s$

The average speed is $d/t=19/9=2.11ms^-1$

The total displacement is $d'=12-7=5m$

The average velocity is $d'/t=5/9=0.56ms^-1$

An object travels North at 6 m/s6 m/s for 2 s2 s and then travels South at 1 m/s1 m/s for 7 s7 s. What are the object's average speed and velocity?