Suppose that 5 J of work is needed to stretch a spring from its natural length of 36 cm to a length of 45 cm.
Required:
a. How much work is needed to stretch the spring from 38 cm to 43 cm? (Round your answer to two decimal places.) J
b. How far beyond its natural length will a force of 45 N keep the spring stretched? (Round your answer one decimal place.
Answers: 1
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