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    Acceleration Deceleration Physics Problem

    A car has a maximum constant acceleration of 10 ft/s^2 and a maximum constant deceleration of 15 ft/s^2. determine the minimum amount of time it would take to drive one mile assuming the car starts and ends at rest and never exceeds the speed limit 55 mi/hr. Why do you need to know the...
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    Spring Problem, Work

    I've been trying for a while to solve this problem http://www.flickr.com/photos/36633646@N03/3379407472/ Do I just find the total force the spring exerts from 400mm to 0 and multiply it by distance b?
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