An Air Conditioning Unit Is Vibrating in Simple Harmonic Motion

Multiple Choice

An air conditioning unit is vibrating in simple harmonic motion with a period of 0.27 s and a range (from the maximum in one direction to the maximum in the other) of 3.0 cm. At t = 0 it is at its central position and moving in the +x direction. What is its position when t = 55 s?

A) x = -0.430 cm
B) x = -0.511 cm
C) x = 0.511 cm
D) x = -1.41 cm
E) x = -1.44 cm