Acar of mass m drives over a speed bump and oscillates in simple harmonic motion with a frequency
f. what would happen to the car’s oscillation frequency if its suspension springs were replaced with stiffer springs such that the spring constant was doubled?

The car’s frequency oscillation would be 2√ times larger if the springs are replaced with stiffer ones and this would double the spring constant. Period and frequency of a simple harmonic oscillator are independent of amplitude. The period is always related to how stiff the system is, the more stiff the object is, the smaller the period and the larger the oscillation frequency.

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