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Page 204 Practice Problem 7.11: If the mass of the elevator (with four what should the spring constant Answer: 2.18x10 N/m. a
is equal to that EXAMPLE 7.11 Elevator safety (or not) to this exoblem we have to account for both gravitational potential en
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mass (m) = 1600 kg. Vi = 8 m/sec Y = 3m. from conservation of energy Kitui = kg +Uf mit may = 0 + 2kx²+ & mg42 (42=0). (3) =

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