An object travels North at $2 m/s$ for $9 s$ and then travels South at $4 m/s$ for $1 s$ . What are the object's average speed and velocity?

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Answer 1 · 2018-02-01T09:20:22

The average speed is $=2.2ms^-1$ .
The average velocity is $=1.4ms^-1$

The total distance travelled

$s=(2*9)+(4*1)=18+4=22m$

The total time is

$t=t_1+t_2=9+1=10s$

The average speed is

$baru=s/t=22/10=2.2ms^-1$

The real distance travelled is

$d=(2*9)-(4*1)=18-4=14m$

The total time is

$t=t_1+t_2=9+1=10s$

The average velocity is

$barv=d/t=14/10=1.4ms^-1$

An object travels North at 2 m/s2 m/s for 9 s9 s and then travels South at 4 m/s4 m/s for 1 s1 s. What are the object's average speed and velocity?