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Q1. A rigid steel frame above the street intersection supports standard traffic lights, each of that is hinged to hang immediately below frame. A gust of wind sets light swinging in a vertical plane. Find out order of magnitude of its period. Situation the quantities you take as data and their values.

Q2. A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 5.10 m waterfall. If the spy's speed is 19.0 m/s and the officials' speed is 26.0 m/s, how far apart will the two vessels be when they land below waterfall?

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