1. The problem statement, all variables and given/known data [PLAIN]http://img651.imageshack.us/img651/8828/capage1.jpg [Broken] 2. Relevant equations F = ma Sum of moments about a point = 0 3. The attempt at a solution My attempt can be seen above. The only part which I seem to have a problem with is part f. In order for there to be a deceleration there must be a nett force acting upwards. Therefore I figure that part a force would remain the same as the mass hasn't changed. part b force would also remain the same and part c force would increase so as to produce the decelleration? f=ma so the nett force would need to be f = 600N, therefore it would increase by 600N?