Posted by abu on Friday, August 12, 2011 at 10:09pm.
deceleration rate * time = Initial speed
= 4 m/s.
It should come to rest after rolling a distance (average speed)*(time) = 16 meters.
You have been given more infrmation that you need, and some of it is inconsistent.
Your deceleration rate also has the wrong units. m/s is not correct units for acceleration
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