A Glider on an Air Track Is Connected by a Spring

Multiple Choice

A glider on an air track is connected by a spring to the end of the air track. If it takes $0.30 \mathrm{~s}$ for the glider to travel the distance of $12 \mathrm{~cm}$ from one turning point to the other, its amplitude is

A) $12 \mathrm{~cm}$
B) $6 \mathrm{~cm}$
C) $24 \mathrm{~cm}$
D) $36 \mathrm{~cm}$
E) $3.6 \mathrm{~cm}$
F) We are not given enough information to answer.