A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down. It bobs up and down 26 times in a min.

Answer 1

I have to find out how to write the equation for the oscillations, and i figured out the amplitude is 1.95, but am confused on how to figure out the rest.