This PhysCast is about simple harmonic motion. Two springs are attached to a block which can oscillate on a frictionless floor. If the left spring is removed it oscillates at a frequency of 30 Hz. If instead the right spring is removed it oscillates at a frequency of 45 Hz. What frequency will the block oscillate at if both springs are attached?

An unknown oscillation frequency (PhysCasts)

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An unknown oscillation frequency (PhysCasts)

An unknown oscillation frequency (PhysCasts)