Your fishing bobber oscillates up and down from the current in the river in a harmonic motion. The bobber moves a total of 5.0 inches from its high point to its low point then returns up to the high point every 5 seconds. Write an equation modeling the motion of the bobber at its high point at time t = 0.

Question

Your fishing bobber oscillates up and down from the current in the river in a harmonic motion.  The bobber moves a total of 5.0 inches from its high point to its low point then returns up to the high point every 5 seconds.  Write an equation modeling the motion of the bobber at its high point at time t = 0.
I got h=5cos(2piT/5)

bobpursley · Answer

amplitude=2.5cos(2PI*t/5)+2.5 On your answer, it will go below zero when cosine is negative.