A force of 100 N is applied to compress the spring. What work is done if the spring is compressed by 4 cm?

The work of the spring force can be calculated using the formula:
A = (k * ∆l ^ 2) / 2, where k is the stiffness of the spring (k = Fcont. / ∆l, where Fcont. Is the compression force of the spring (Fcont. = 100 N), ∆l = the amount of spring deformation (compression springs, ∆l = 4 cm = 0.04 m)).
Let’s calculate the work of the spring force:
A = (k * ∆l ^ 2) / 2 = ((Fcont. / ∆l) * ∆l ^ 2) / 2 = Fcont. * ∆l / 2 = 100 * 0.04 / 2 = 4/2 = 2 J.
Answer: The work of the spring force is 2 J.