Suppose that 3 J of work is needed to stretch a spring from its natural length of 34 cm to a length of 43 cm. (a) How mu

[answerhappygod]

Suppose that 3 J of work is needed to stretch a spring
from its natural length of 34 cm to a length
of 43 cm.
(a) How much work (in J) is needed to stretch the spring
from 39 cm to 41 cm? (Round your answer to
two decimal places.)
(b) How far beyond its natural length (in cm) will a force
of 50 N keep the spring stretched? (Round your answer one
decimal place.)