QUESTION 103 The rumble strip is a physical device installed on the surface of a roadway so as to cause vibration and noise when a vehicle passes over it, alerting to an atypical situation ahead, such as construction, tolls, or pedestrian crossing. When passing over rumble strips, the vehicle's suspension undergoes vibrations that produce sound waves, resulting in a peculiar noise. Consider a vehicle that passes with constant velocity equal to $108 \frac{\mathrm{~km}}{\mathrm{~h}}$ over a rumble strip whose strips are separated by a distance of 8 cm. Available at: \href{http://www.denatran.gov.br}{www.denatran.gov.br}. Accessed on: 2 Sep. 2015 (adapted). The frequency of the vehicle's vibration perceived by the driver during passage over this rumble strip is closest to (A) 8.6 hertz. (B) 13.5 hertz. (C) 375 hertz. (D) 1350 hertz. (E) 4860 hertz.
QUESTION 103
The rumble strip is a physical device installed on the surface of a roadway so as to cause vibration and noise when a vehicle passes over it, alerting to an atypical situation ahead, such as construction, tolls, or pedestrian crossing. When passing over rumble strips, the vehicle's suspension undergoes vibrations that produce sound waves, resulting in a peculiar noise. Consider a vehicle that passes with constant velocity equal to $108 \frac{\mathrm{~km}}{\mathrm{~h}}$ over a rumble strip whose strips are separated by a distance of 8 cm.
Available at: \href{http://www.denatran.gov.br}{www.denatran.gov.br}. Accessed on: 2 Sep. 2015 (adapted).
The frequency of the vehicle's vibration perceived by the driver during passage over this rumble strip is closest to\\
(A) 8.6 hertz.\\
(B) 13.5 hertz.\\
(C) 375 hertz.\\
(D) 1350 hertz.\\
(E) 4860 hertz.