Friday, February 12, 2010

True or false physics question?

If the average speed of an object is zero, then its average velocity must be zero; but if its average velocity is zero, its average speed is not necessarily zero. True or false physics question?
True: Velocity is a vector so you can have negative numbers as well..therefore you could have an average of zero velocity but speed is not a vector so even if you are driving backwards, and that would make the velocity negative because the direction is reversed, you still are going in reverse at a certain speed so your speed would not be zero.





Hope that helpsTrue or false physics question?
True. If you were to travel 100 miles away from home at 55 mph, and travel back home at 55 mph your average speed would be 55 mph but your average velocity would be 0 since the vectors in each direction cancel each other out for velocity.
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