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Which frequency is typical for a comfortable passenger car body?

  • A.About one hertz
  • B.About ten hertz, which corresponds to the frequency at which the unsprung mass oscillates upon the tyre spring
  • C.About one hundred hertz
  • D.About five hertz, which is the frequency at which the human body is most sensitive to a vertical vibration

Answer: A

One hertz corresponds roughly to the rhythm of walking and is the frequency the body accepts most readily. Sports cars run higher, around one and a half to two hertz. Wheel hop occurs near ten to fifteen hertz. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Naming what changes and what stays the same is the reliable route through questions of this shape. The shared behaviour explains why these belong together and the differences explain why both exist.

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