1. The problem statement, all variables and given/known data https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/spring09/homework/10/bowling_ball/8.gif [Broken] A bowling ball 25 cm in diameter is slid down an alley with which it has a coefficient of sliding friction of µ = 0.6. The ball has an initial velocity of 11 m/s and no rotation. g = 9.81 m/s^2. Given that the initial deceleration of the ball is 5.886. What is the initial angular acceleration of the ball? 2. Relevant equations For a sphere Icm = (2/5)mr^2. 3. The attempt at a solution Firstly, i tried to use the formula [tex]\alpha = a/R[/tex] Then i got some value of acceleration which turns out to be wrong. After that, when i used the torque equation [tex]\tau = I\alpha[/tex] I got the different answer and it was correct... Why did i get the wrong answer at the first attempt? I am really confused when i could use the transformation formulae([tex]s to \theta, v to \omega, a to \alpha[/tex]).... Could someone help me out here..?