(Answered) 1 a 220-cm-square sign is impacted straight on by a 50 ms

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1. A 220-cm-square sign is impacted straight on by a 50 m=s 10-C wind. Estimate the force on the sign. If the sign is held by a single 3-m-high post imbedded in concrete, what moment would exist at the base of the post?

2. A 20-cm-diameter smooth sphere is rigged with a strain gauge calibrated to measure the force on the sphere. Estimate the wind speed in 20-C air if the gauge measures (a) 4 N and (b) 0.5 N.

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