46 mi/hr = 20.56 m/s
so v = at means t = 20.56/2.35 s
work the other similarly
or, just consider the ratio of time lengths
A VW Beetle goes from 0 to 46.0 mi/h with an acceleration of +2.35 m/s2. (a) How much time does it take for the Beetle to reach this speed? (b) A top-fuel dragster can go from 0 to 46.0 mi/h in 0.750 s. Find the acceleration (in m/s2) of the dragster.
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