How much force is needed to stretch a spring 1.2m if the spring constant is 8.5N/m

10.2N

Explanation:

Given spring constant k = 8.5N and and elastic limit e = 1.2m

using the relation F=ke (hookes law)

law stating that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.

substituting the values into the equation, it becomes F=8.5N * 1.2m.

= 10.2N/m ~~ 10.2N as final answer.