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(4%) Problem 15: Near the top of the Citigroup Center building in New York City, there is an object with mass of 4.2 x 10 kg on springs that have adjustable force constants. Its function is to dampen wind-driven oscillations of the building by oscillating at the same frequency as the building is being driven-the driving force is transferred to the object, which oscillates instead of the entire building. Patel, Simran - simran.patel@doane.edu @theexpertta.com - tracking id: 9N69-D3-16-42-9192-40021. In accordance with Expert TA's Terms of Service, copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. A 50% Part (a) What effective force constant, in N/m, should the springs have to make them oscillate with a period of 1.8 s? Grade Summary k = 1 Deductions 0% Potential 100% sin() cos() tan() 7 8 HOME Submissions cotan( acosO E 4 5 6 Attempts remaining: 999 asin() (0% per attempt) atan( acotan( sinh() 2 3 detailed view cosh() tanh() cotanh() + END Degrees O Radians VC BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 4 50% Part (b) What energy, in joules, is stored in the springs for a 1.2 m displacement from equilibrium