Suppose that 6 j of work is needed to stretch a spring from its natural length of 24 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 29 cm to 31 cm? (round your answer

Suppose that 6 j of work is needed to stretch a spring from its natural length of 24 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 29 cm to 31 cm? (round your answer to two decimal places.) 1 correct: your answer is correct. j (b) how far beyond its natural length will a force of 30 n keep the spring stretched? (round your answer one decimal place.)