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Physics, 30.11.2019 04:40 anaiyamills

When a car drives along a "washboard" road, the regular bumps cause the wheels to oscillate on the springs. (what actually oscillates is each axle assembly, comprising the axle and its two wheels.) find the speed of my car at which this oscillation resonates, given the following information:

(a) when four 80-kg men climb into my car, the body sinks by a couple of centimeters. use this to estimate the spring constant k of each of the four springs.
(b) if an axle assembly (axle plus two wheels) has total mass 50 kg, what is the natural frequency of the assembly oscillating on its two springs?
(c) if the bumps on a road are 80 cm apart, at about what speed would these oscillations go into resonance?

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