Chapter 10, Problem 46P

& EST Willis Tower vibration The mass of the Willis (formerly Sears) Tower in Chicago is about $2**\#x00D7;{10}^8$ kg. The tower sways back and forth at a frequency of about $0.10\text{ Hz}$. (a) Estimate the effective spring constant for this swaying motion. Explain why you included a particular number of significant figures. (b) A gust of wind hitting the building exerts a force of about $4\times {10}^6\text{N}$. By approximately how much is the top of the building displaced by the wind? Explain why you included a particular number of significant figures State the assumptions that you made. Does your answer make sense?