Determine how many centimeters the spring with a stiffness of 120 N / m will lengthen if a force of 240N is applied to it.

The elastic force acting on the spring can be calculated using the formula:
Fcont. = k * ∆l, where Fcont. Is the elastic force acting on the spring (Fel. = 240 N), k is the stiffness of the spring (k = 120 N / m), ∆l is the elongation (deformation) of the spring.
Let’s express and calculate the extension of the spring:
∆l = Fcont. / k = 240/120 = 2 m = 200 cm.
Answer: The spring will lengthen by 200 cm.