# Help with Acceleration

by Mirole
Tags: acceleration, average
 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.