Final answer:
The work done in extending the spring by 60mm is 1.71 J.
Step-by-step explanation:
The work done in extending a spring can be calculated using the formula:
Work = 0.5 * k * (x^2)
Where k is the stiffness of the spring and x is the displacement of the spring.
In this case, the stiffness of the spring is given as 950 nm^-1 and the displacement is 60 mm.
Converting the displacement to meters, we get x = 0.06 m. Plugging this into the formula, we can calculate the work done:
Work = 0.5 * 950 nm^-1 * (0.06 m)^2 = 1.71 J