1. The problem statement, all variables and given/known data The pistons of a 4 cylinder car engine when idling move approx. in SHM with an Amplitude of 50mm and at a frequency of 110Hz.Calculate *the max speed of the pistons. *max acceleration of the pistons. 2. Relevant equations max velocity = A(omega),max acceleration =A(omega)^2, omega= 2pie/T,T=1/f 3. The attempt at a solution for the first bit i did: Ax2pie/T =>0.05x2(pie)/9.09x10^-3 (from T=1/F) => 34.56m/s. The second bit is simply acceleration=A(omega)^2 =>0.05 x (34.56)^2 => 59.71m/s^2 hm.. is this how i am supposed to do it ? :) Thanks in advance.