A baby in a bouncer bounces up and down with a period of 1.2s and amplitude of 90mm. Calculate the baby's maximum velocity.

Relevant equations: 1) frequency = 1/ time period; 2) v(max) = Amplitude*(2pifrequency)

First, we need to calculate the frequency of the baby's oscillation. That is, the number of times, per second, that the baby moves up, then down, and back to their original position. We do this by substituting the values into equation 1. Then, we use that value in equation 2 to find the speed at which the baby moves fastest - their maximum velocity. They will travel at this speed when moving through their original position when their acceleration is zero.