Posted by **Tammy** on Friday, September 21, 2007 at 1:56pm.

"from zero to sixty in 8 seconds" is a description of:

a) average speed

b) instantaneous speed

c)average acceleration

d) instantaneous acceleration

I know for sure that a) and c) aren't the right answers since average is over a long time period or the whole trip. I believe b) is the correct answer since speed is a scalar.

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