Calculating Average Speed

A marble rolls 5.2 m in 1.8 s. What was the marble's average speed?

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Strategy
We know the distance the marble travels, 5.2 m, and the time interval, 1.8 s. We can use these values in the average speed equation.
Solution
$v_{avg} = \frac{distance}{time} = \frac{5.2 m}{1.8 s} = 2.9 m/s$

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