Suppose that 23 of work is needed to stretch a spring from its natural length of 30 cm to a length of 44 cm.
(a) How much work is needed to stretch the spring from 34 cm to 36 cm? (Round your answer to two decimal places.)
(b) How far beyond its natural lehgth will a force of 45 N keep the spring stretched? (Round your answer one decimal place.)
cm
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