An object travels North at $5 m/s$ for $3 s$ and then travels South at $1 m/s$ for $4 s$ . What are the object's average speed and velocity?

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Answer 1 · 2016-05-01T13:27:23

Average speed = $19/7$ m/s
Average velocity= $11/7$ m/s

The distance $=5*3+1*4=19m$
Averagr= $19/(3+4)=19/7$ m/s
The displacement $=5*3-1*4=11m$
Average velocity $=11/(3+4)=11/7$ m/s

An object travels North at 5 m/s 5 m/s for 3 s3 s and then travels South at 1 m/s 1 m/s for 4 s 4 s. What are the object's average speed and velocity?