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# Average velocity when total displacement is zero? watch

1. Av. velocity = Total displacement/total time taken but if total displacement is 0 surely av. velocity is 0? would this be correct to say the av velocity is 0 in this case?
2. (Original post by Bertybassett)
Av. velocity = Total displacement/total time taken but if total displacement is 0 surely av. velocity is 0? would this be correct to say the av velocity is 0 in this case?
Correct. Think of examples like going exactly 10m/s for 1 second then -5m/s for 2 seconds. Average velocity is (10*1 + (-5*2)) / 3 = 0/3. And your total displacement is 10 -5 -5 = 0.

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Updated: November 9, 2017
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