The mass of the car is 1400 kg, which is evenly distributed over the four springs. The car's own weight compresses the springs into a pile for a distance of 20 cm. What is the characteristic frequency of car vibration in Hertz to one decimal place?

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Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.