Acceleration is measured in m/s2 (metres per second squared)
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If the ball started off stationary and the acceleration is the same for the 2 seconds, then the acceleration of the ball is:Speed / time = acceleration9 (m/s) / 2 (s) = 4.5 (m/s/s)Hope this helps.
50 meters in 10 seconds is faster. you go 5 meters per second in 50 meters per second, and you go 6 meters a second in 5 seconds..
4 meters/2 seconds = 2 meters/second.
395000 meters/9000 seconds is 43.889 meters/second
It works like this:10 meters / 3.09 seconds * 30 seconds / half minute = 97.09 meters / half-minute