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 Feb 2nd 2010, 06:15 PM #1 Senior Member   Join Date: Mar 2009 Posts: 129 1D Kinematics Question Question: "A set of keys slides along the floor, coming to rest 1.9 meters from where they started. If the initial speed of the keys was 4.8 m/s then .... acceleration = ? time = ?" The question seems to give only final position and initial velocity which is not enough information to use any of the Equations of Kinematics with Uniform Acceleration! What am I missing? Any help would be greatly appreciated! Thanks in advance! Edit: Nevermind, I just needed to see that final velocity is 0. If others care; a = -6.0632 m/s^2 and t = 0.7917 s. Last edited by s3a; Feb 2nd 2010 at 07:13 PM.

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