Undamped Motion Example

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This video solves for the initial velocity of a mass which vibrates undamped within a given range.

IMPORTANT NOTE: At 3:10, the mass should have been provided as 4 kg (not 6 kg). Using this, the natural frequency works out to 5.48 rad/s as is shown and carried through in the video. Apologies for this mistake.
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sqrt(3*40/6) = 4.47 rad/s or have I missed something

danieltaylor