Negative Velocity, but not Speed
Name: Terry B.
in the question already on the site : Is there a negative
velocity? if so how is it achieved?
John Hawley states, logically, you cannot have negative speed.
However, with the current Hurricane over the US Eastern seaboard site:
quotes wind velocity of -64 knots to +64 knots (if I read it
Speed is path length (distance) divided by time. Neither quantity
can be negative. Hence, speed is always positive.
Velocity is the displacement (change in position relative to a
reference point) divided by time. You can have a negative change in
position, giving a negative velocity.
Nathan A. Unterman
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Update: June 2012