# Help with Acceleration

by Mirole
Tags: acceleration, average
 P: 34 1. The problem statement, all variables and given/known data The figure shows the motion diagram, made at two frames of film per second, of a ball rolling along a track. The track has a 3.0m-long sticky section. http://img30.imageshack.us/img30/2278/screenshotkh.png <-- The graph with the coordinates 2. Relevant equations a=v/t 3. The attempt at a solution a=1.98-0/1.5-1 =3.96 a=3-2/2-1 = 1 + 3.96 I've tried a bunch of ways but could not get it [
 P: 39 You are asked to figure out the acceleration of the ball in the sticky section of the track. (1) First determine the initial speed $V_i$? (2) Then determine the final speed $V_f$? (3) What is the distance $x$ over which this change in speed occurs? (4) Have you learnt a formula which relates these three quantities? The formula I am thinking of is $$V_f^2 - V_i^2 = 2 a x$$. Then use this formula and and ask your teacher if it is legitimate to do so.
 P: 34 Ok, I got it. Thanks!

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